From personal_submersibles at psubs.org Sun Jun 1 15:33:15 2025 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Sun, 1 Jun 2025 09:33:15 -1000 Subject: [PSUBS-MAILIST] buffing Message-ID: Jon, the Novus compound that I ordered for cleaning up a viewport should be here in a couple of days and was wondering if there was a certain type of buffing pad you used and should I be concerned about the RPM I use? Rick -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Jun 2 12:55:16 2025 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Mon, 2 Jun 2025 16:55:16 +0000 (UTC) Subject: [PSUBS-MAILIST] buffing In-Reply-To: References: Message-ID: <321358833.4029036.1748883316841@mail.yahoo.com> Rick,? I don't think the pad actually matters all that much but see link for pads I purchased.? Don't mix the compound and pads, use only one compound with each pad.? I used the green pad for the coarse polish and yellow pad for the fine polish.? Speed also doesn't matter in my opinion, I think I used medium speed.? Beware of your surroundings however, a motorized buffer with throw some of the polish around and it's difficult to get off when it dries.? Use a drop cloth or plastic to protect anything in the vicinity that you don't want to get polish on.? As well, the polish will get all over your buffer so will require some cleanup when you are done. Amazon.com | | | | Amazon.com | | | On Sunday, June 1, 2025 at 03:35:02 PM EDT, Rick Patton via Personal_Submersibles wrote: Jon, the Novus compound?that I ordered for cleaning up a viewport should be here in a couple of days and was wondering if there was a certain?type of buffing pad you used and should I be concerned about the RPM I use?? Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Jun 2 14:39:58 2025 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Mon, 2 Jun 2025 08:39:58 -1000 Subject: [PSUBS-MAILIST] buffing In-Reply-To: <321358833.4029036.1748883316841@mail.yahoo.com> References: <321358833.4029036.1748883316841@mail.yahoo.com> Message-ID: Thanks Jon. Where are you at with your build? Rick On Mon, Jun 2, 2025 at 8:09?AM Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, > > I don't think the pad actually matters all that much but see link for pads > I purchased. Don't mix the compound and pads, use only one compound with > each pad. I used the green pad for the coarse polish and yellow pad for > the fine polish. Speed also doesn't matter in my opinion, I think I used > medium speed. Beware of your surroundings however, a motorized buffer with > throw some of the polish around and it's difficult to get off when it > dries. Use a drop cloth or plastic to protect anything in the vicinity > that you don't want to get polish on. As well, the polish will get all > over your buffer so will require some cleanup when you are done. > > Amazon.com > > Amazon.com > > > > > > On Sunday, June 1, 2025 at 03:35:02 PM EDT, Rick Patton via > Personal_Submersibles wrote: > > > Jon, the Novus compound that I ordered for cleaning up a viewport should > be here in a couple of days and was wondering if there was a certain type > of buffing pad you used and should I be concerned about the RPM I use? > > Rick > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Jun 2 16:07:45 2025 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Mon, 2 Jun 2025 13:07:45 -0700 Subject: [PSUBS-MAILIST] CO2 In-Reply-To: <1475430295.3543034.1748725926000@mail.yahoo.com> References: <11643796.3454108.1748704289349@mail.yahoo.com> <1475430295.3543034.1748725926000@mail.yahoo.com> Message-ID: Rick, When you were laying down, your body displaced the settled c02 and pushed it up toward your meter. Have a fan running and rerun the test, you will get different results. Your scrubber fan should be pushing enough air to keep your cabin more balanced. Question: when you were laying down, were you using a chest board? I would love to see your design and dimensions if you can share. I seem to remember that Alec had one in Snoopy. I'm looking to work out a design for the VAST Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Sat, May 31, 2025 at 2:35?PM Alan James via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Jon, > I get mixed results with chat GPT. > I have the paid version & was advised by an expert to select the 03 > variant that is a lot slower & more thorough, but requires you to be more > specific in your requests. > I asked it to design a scrubber for me but the result was pretty > disappointing. > It is very good at calculations. > Some times it comes up with amazing results, other times you need to > correct it several times. > Alan > > Yahoo Mail: Search, organise, conquer > > > On Sun, 1 Jun 2025 at 1:12 am, Jon Wallace via Personal_Submersibles > wrote: > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Jun 2 18:54:59 2025 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Mon, 2 Jun 2025 12:54:59 -1000 Subject: [PSUBS-MAILIST] CO2 In-Reply-To: References: <11643796.3454108.1748704289349@mail.yahoo.com> <1475430295.3543034.1748725926000@mail.yahoo.com> Message-ID: Hi Dave, When I was in the sub tig welding a bracket for my HP bailout bottle, I did not have the fan running as I hadn't planned on being inside that long. I do have a fan that really moves the air but it's pretty noisy so after I have had several dives, I'll see if the noise is too loud and will step down to the computer fans or something. I'll post some pictures that I just took of the inside and outside of the sub. I don't have a chest board. Rick On Mon, Jun 2, 2025 at 10:39?AM David Colombo via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, When you were laying down, your body displaced the settled c02 and > pushed it up toward your meter. Have a fan running and rerun the test, you > will get different results. Your scrubber fan should be pushing enough air > to keep your cabin more balanced. Question: when you were laying down, were > you using a chest board? I would love to see your design and dimensions if > you can share. I seem to remember that Alec had one in Snoopy. I'm looking > to work out a design for the VAST > > Best Regards, > David Colombo > > 804 College Ave > Santa Rosa, CA. 95404 > (707) 536-1424 > www.SeaQuestor.com > > > > On Sat, May 31, 2025 at 2:35?PM Alan James via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> Jon, >> I get mixed results with chat GPT. >> I have the paid version & was advised by an expert to select the 03 >> variant that is a lot slower & more thorough, but requires you to be more >> specific in your requests. >> I asked it to design a scrubber for me but the result was pretty >> disappointing. >> It is very good at calculations. >> Some times it comes up with amazing results, other times you need to >> correct it several times. >> Alan >> >> Yahoo Mail: Search, organise, conquer >> >> >> On Sun, 1 Jun 2025 at 1:12 am, Jon Wallace via Personal_Submersibles >> wrote: >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Jun 2 20:56:22 2025 From: personal_submersibles at psubs.org (via Personal_Submersibles) Date: Tue, 3 Jun 2025 12:56:22 +1200 Subject: [PSUBS-MAILIST] CO2 In-Reply-To: References: Message-ID: <00f601dbd422$5540d390$ffc27ab0$@gmail.com> I am finally getting near to a pool test after 15 years. Weeks now not months. I have been plagued with CANBUS issues and now trying to get an HMI interface working for all the sensors, batteries, etc. Just a couple of questions for the practical people. 1. What is the accepted 3 day quantity of sofnolime for 2 people. 2. What size is recommended for the scrubbers? 3. Where is the bet place to buy it. Regards, Hugh -----Original Message----- From: Personal_Submersibles On Behalf Of via Personal_Submersibles Sent: Tuesday, 3 June 2025 4:56 AM To: personal_submersibles at psubs.org Subject: Personal_Submersibles Digest, Vol 138, Issue 1 Send Personal_Submersibles mailing list submissions to personal_submersibles at psubs.org To subscribe or unsubscribe via the World Wide Web, visit http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles or, via email, send a message with subject or body 'help' to personal_submersibles-request at psubs.org You can reach the person managing the list at personal_submersibles-owner at psubs.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Personal_Submersibles digest..." Today's Topics: 1. Re: CO2 (Jon Wallace via Personal_Submersibles) 2. Re: CO2 (Rick Patton via Personal_Submersibles) 3. Re: CO2 (Alan James via Personal_Submersibles) 4. buffing (Rick Patton via Personal_Submersibles) 5. Re: buffing (Jon Wallace via Personal_Submersibles) ---------------------------------------------------------------------- Message: 1 Date: Sat, 31 May 2025 15:11:29 +0000 (UTC) From: Jon Wallace via Personal_Submersibles To: Personal Submersibles General Discussion Subject: Re: [PSUBS-MAILIST] CO2 Message-ID: <11643796.3454108.1748704289349 at mail.yahoo.com> Content-Type: text/plain; charset="utf-8" Alan will like this, ChatGPT says 0.0523 kg CO2 within 1217 liters (approx volume of K350) converts to 21,891 ppm.? That corresponds closely to the empirical results Steve McQueen got with his K-250. Jon On Saturday, May 31, 2025 at 12:28:47 AM EDT, Sean T. Stevenson via Personal_Submersibles wrote: Per the ABS RULES FOR BUILDING AND CLASSING UNDERWATER VEHICLES, SYSTEMS AND HYPERBARIC FACILITIES (2024): Section 8 Life Support and Environmental Control Systems 8.5 Design Principles 8.5.5 Standard Person (2013) Carbon Dioxide (CO2) Produced: 0.0523 (0.115) kg (lbs) per hour at 1 atm. Sean -------- Original Message -------- On 2025-05-30 20:46, irox via Personal_Submersibles wrote: One consideration. CO2 is heavier than Nitrogen, so it may sink to the floor, if the meter is near the floor the reading may not be representative of the actual cabin CO2 level. Also if the meter is somewhere than CO2 can 'pool' around it reading may be higher. ? Moving around will also help mix up gases which may help give a more accurate CO2 reading. _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 2 Date: Sat, 31 May 2025 07:42:49 -1000 From: Rick Patton via Personal_Submersibles To: Personal Submersibles General Discussion Subject: Re: [PSUBS-MAILIST] CO2 Message-ID: Content-Type: text/plain; charset="utf-8" I had the monitor in the middle of the hull so it would give an accurate reading. I know that Co2 is heavy but what confuses me is the fact that it rose so fast when lying down and then started dropping when I sat up?? I have a fan installed in the back for atmosphere circulation while submerged but it is noisier than I would like but really moves the air around but might end up using a computer fan, just concerned that I will get the proper movement of air. Rick On Sat, May 31, 2025 at 5:01?AM Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, > > If you haven't already I would install some fans to help circulate the > air. I have two 4inch computer fans, one fore, one aft, that work > pretty good for this purpose and they draw negligible power. > > Jon > > > > On Friday, May 30, 2025 at 11:47:24 PM EDT, irox via > Personal_Submersibles wrote: > > > One consideration. CO2 is heavier than Nitrogen, so it may sink to the > floor, if the meter is near the floor the reading may not be > representative of the actual cabin CO2 level. Also if the meter is > somewhere than CO2 can 'pool' around it reading may be higher. > > > > Moving around will also help mix up gases which may help give a more > accurate CO2 reading. > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 3 Date: Sat, 31 May 2025 21:12:05 +0000 (UTC) From: Alan James via Personal_Submersibles To: Personal Submersibles General Discussion Subject: Re: [PSUBS-MAILIST] CO2 Message-ID: <1475430295.3543034.1748725926000 at mail.yahoo.com> Content-Type: text/plain; charset="utf-8" Jon, I get mixed results with chat GPT. I have the paid version & was advised by an expert to select the 03 variant that is a lot slower & more thorough, but requires you to be more specific in your requests. I asked it to design a scrubber for me but the result was pretty disappointing. It is very good at calculations. Some times it comes up with amazing results, other times you need to correct it several times. Alan Yahoo Mail: Search, organise, conquer On Sun, 1 Jun 2025 at 1:12 am, Jon Wallace via Personal_Submersibles wrote: _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 4 Date: Sun, 1 Jun 2025 09:33:15 -1000 From: Rick Patton via Personal_Submersibles To: psubs chat room Subject: [PSUBS-MAILIST] buffing Message-ID: Content-Type: text/plain; charset="utf-8" Jon, the Novus compound that I ordered for cleaning up a viewport should be here in a couple of days and was wondering if there was a certain type of buffing pad you used and should I be concerned about the RPM I use? Rick -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 5 Date: Mon, 2 Jun 2025 16:55:16 +0000 (UTC) From: Jon Wallace via Personal_Submersibles To: psubs chat room Subject: Re: [PSUBS-MAILIST] buffing Message-ID: <321358833.4029036.1748883316841 at mail.yahoo.com> Content-Type: text/plain; charset="utf-8" Rick,? I don't think the pad actually matters all that much but see link for pads I purchased.? Don't mix the compound and pads, use only one compound with each pad.? I used the green pad for the coarse polish and yellow pad for the fine polish.? Speed also doesn't matter in my opinion, I think I used medium speed.? Beware of your surroundings however, a motorized buffer with throw some of the polish around and it's difficult to get off when it dries.? Use a drop cloth or plastic to protect anything in the vicinity that you don't want to get polish on.? As well, the polish will get all over your buffer so will require some cleanup when you are done. Amazon.com | | | | Amazon.com | | | On Sunday, June 1, 2025 at 03:35:02 PM EDT, Rick Patton via Personal_Submersibles wrote: Jon, the Novus compound?that I ordered for cleaning up a viewport should be here in a couple of days and was wondering if there was a certain?type of buffing pad you used and should I be concerned about the RPM I use?? Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Subject: Digest Footer _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles ------------------------------ End of Personal_Submersibles Digest, Vol 138, Issue 1 ***************************************************** From personal_submersibles at psubs.org Mon Jun 2 21:24:56 2025 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Tue, 3 Jun 2025 01:24:56 +0000 (UTC) Subject: [PSUBS-MAILIST] CO2 In-Reply-To: <00f601dbd422$5540d390$ffc27ab0$@gmail.com> References: <00f601dbd422$5540d390$ffc27ab0$@gmail.com> Message-ID: <948130669.4260277.1748913896627@mail.yahoo.com> That's great news Hugh. All the best with the testing. I bought my sofa lime from Global Dive years ago. Presume they are still selling it. Alan Yahoo Mail: Search, organise, conquer On Tue, 3 Jun 2025 at 10:57 am, via Personal_Submersibles wrote: I am finally getting near to a pool test after 15 years.? Weeks now not months. I have been plagued with CANBUS issues and now trying to get an HMI interface working for all the sensors, batteries, etc. Just a couple of questions for the practical people. 1. What is the accepted 3 day quantity of sofnolime for 2 people.? 2. What size is recommended for the scrubbers? 3. Where is the bet place to buy it. Regards, Hugh -----Original Message----- From: Personal_Submersibles On Behalf Of via Personal_Submersibles Sent: Tuesday, 3 June 2025 4:56 AM To: personal_submersibles at psubs.org Subject: Personal_Submersibles Digest, Vol 138, Issue 1 Send Personal_Submersibles mailing list submissions to ??? personal_submersibles at psubs.org To subscribe or unsubscribe via the World Wide Web, visit ??? http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles or, via email, send a message with subject or body 'help' to ??? personal_submersibles-request at psubs.org You can reach the person managing the list at ??? personal_submersibles-owner at psubs.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Personal_Submersibles digest..." Today's Topics: ? 1. Re: CO2 (Jon Wallace via Personal_Submersibles) ? 2. Re: CO2 (Rick Patton via Personal_Submersibles) ? 3. Re: CO2 (Alan James via Personal_Submersibles) ? 4. buffing (Rick Patton via Personal_Submersibles) ? 5. Re: buffing (Jon Wallace via Personal_Submersibles) ---------------------------------------------------------------------- Message: 1 Date: Sat, 31 May 2025 15:11:29 +0000 (UTC) From: Jon Wallace via Personal_Submersibles ??? To: Personal Submersibles General Discussion ??? Subject: Re: [PSUBS-MAILIST] CO2 Message-ID: <11643796.3454108.1748704289349 at mail.yahoo.com> Content-Type: text/plain; charset="utf-8" Alan will like this, ChatGPT says 0.0523 kg CO2 within 1217 liters (approx volume of K350) converts to 21,891 ppm.? That corresponds closely to the empirical results Steve McQueen got with his K-250. Jon ? ? On Saturday, May 31, 2025 at 12:28:47 AM EDT, Sean T. Stevenson via Personal_Submersibles wrote:? Per the ABS RULES FOR BUILDING AND CLASSING UNDERWATER VEHICLES, SYSTEMS AND HYPERBARIC FACILITIES (2024): Section 8 Life Support and Environmental Control Systems 8.5 Design Principles 8.5.5 Standard Person (2013) Carbon Dioxide (CO2) Produced: 0.0523 (0.115) kg (lbs) per hour at 1 atm. Sean -------- Original Message -------- On 2025-05-30 20:46, irox via Personal_Submersibles wrote: One consideration. CO2 is heavier than Nitrogen, so it may sink to the floor, if the meter is near the floor the reading may not be representative of the actual cabin CO2 level. Also if the meter is somewhere than CO2 can 'pool' around it reading may be higher. ? Moving around will also help mix up gases which may help give a more accurate CO2 reading. _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles ? -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 2 Date: Sat, 31 May 2025 07:42:49 -1000 From: Rick Patton via Personal_Submersibles ??? To: Personal Submersibles General Discussion ??? Subject: Re: [PSUBS-MAILIST] CO2 Message-ID: ??? Content-Type: text/plain; charset="utf-8" I had the monitor in the middle of the hull so it would give an accurate reading. I know that Co2 is heavy but what confuses me is the fact that it rose so fast when lying down and then started dropping when I sat up?? I have a fan installed in the back for atmosphere circulation while submerged but it is noisier than I would like but really moves the air around but might end up using a computer fan, just concerned that I will get the proper movement of air. Rick On Sat, May 31, 2025 at 5:01?AM Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, > > If you haven't already I would install some fans to help circulate the > air.? I have two 4inch computer fans, one fore, one aft, that work > pretty good for this purpose and they draw negligible power. > > Jon > > > > On Friday, May 30, 2025 at 11:47:24 PM EDT, irox via > Personal_Submersibles wrote: > > > One consideration. CO2 is heavier than Nitrogen, so it may sink to the > floor, if the meter is near the floor the reading may not be > representative of the actual cabin CO2 level. Also if the meter is > somewhere than CO2 can 'pool' around it reading may be higher. > > > > Moving around will also help mix up gases which may help give a more > accurate CO2 reading. > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 3 Date: Sat, 31 May 2025 21:12:05 +0000 (UTC) From: Alan James via Personal_Submersibles ??? To: Personal Submersibles General Discussion ??? Subject: Re: [PSUBS-MAILIST] CO2 Message-ID: <1475430295.3543034.1748725926000 at mail.yahoo.com> Content-Type: text/plain; charset="utf-8" Jon, I get mixed results with chat GPT. I have the paid version & was advised by an expert to select the 03 variant that is a lot slower & more thorough, but requires you to be more specific in your requests. I asked it to design a scrubber for me but the result was pretty disappointing. It is very good at calculations. Some times it comes up with amazing results, other times you need to correct it several times. Alan Yahoo Mail: Search, organise, conquer ? On Sun, 1 Jun 2025 at 1:12 am, Jon Wallace via Personal_Submersibles wrote: _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles ? -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 4 Date: Sun, 1 Jun 2025 09:33:15 -1000 From: Rick Patton via Personal_Submersibles ??? To: psubs chat room Subject: [PSUBS-MAILIST] buffing Message-ID: ??? Content-Type: text/plain; charset="utf-8" Jon, the Novus compound that I ordered for cleaning up a viewport should be here in a couple of days and was wondering if there was a certain type of buffing pad you used and should I be concerned about the RPM I use? Rick -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 5 Date: Mon, 2 Jun 2025 16:55:16 +0000 (UTC) From: Jon Wallace via Personal_Submersibles ??? To: psubs chat room Subject: Re: [PSUBS-MAILIST] buffing Message-ID: <321358833.4029036.1748883316841 at mail.yahoo.com> Content-Type: text/plain; charset="utf-8" Rick,? I don't think the pad actually matters all that much but see link for pads I purchased.? Don't mix the compound and pads, use only one compound with each pad.? I used the green pad for the coarse polish and yellow pad for the fine polish.? Speed also doesn't matter in my opinion, I think I used medium speed.? Beware of your surroundings however, a motorized buffer with throw some of the polish around and it's difficult to get off when it dries.? Use a drop cloth or plastic to protect anything in the vicinity that you don't want to get polish on.? As well, the polish will get all over your buffer so will require some cleanup when you are done. Amazon.com | | |? | Amazon.com | | | ? ? On Sunday, June 1, 2025 at 03:35:02 PM EDT, Rick Patton via Personal_Submersibles wrote:? Jon, the Novus compound?that I ordered for cleaning up a viewport should be here in a couple of days and was wondering if there was a certain?type of buffing pad you used and should I be concerned about the RPM I use?? Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles ? -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Subject: Digest Footer _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles ------------------------------ End of Personal_Submersibles Digest, Vol 138, Issue 1 ***************************************************** _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Jun 2 22:44:53 2025 From: personal_submersibles at psubs.org (Alec Smyth via Personal_Submersibles) Date: Mon, 2 Jun 2025 22:44:53 -0400 Subject: [PSUBS-MAILIST] CO2 In-Reply-To: <948130669.4260277.1748913896627@mail.yahoo.com> References: <00f601dbd422$5540d390$ffc27ab0$@gmail.com> <948130669.4260277.1748913896627@mail.yahoo.com> Message-ID: Hi Hugh, Congrats! I'm really looking forward to your boat hitting the water. 1) The Sofnolime will give you 4 person-hours per pound, so 2 people for 3 days requires 36 pounds. 2) There isn't a standard size. Most of us go small because our dives are relatively short and we don't like throwing out barely-used absorbent. The rest of the absorvent supply is carried in small containers, ideally ones that match the size of your scrubbers. 3) For about 2-3 years now, I've been using this veterinary soda lime: https://jorvet.com/product/jorvet-soda-lime-5-gallon/ It costs far less than the "human" absorbent, but the chemistry is just the regular old soda-lime that's been used for a century. I read up on this a bit and learned that human CO2 absorbents have been adapted in recent years to deal with anesthesia that delivered through breathing gases during surgery. It's color-indicating and the same mesh size as what I used to use before, so no changes were needed for the scrubbers. Best, Alec On Mon, Jun 2, 2025 at 9:25?PM Alan James via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > That's great news Hugh. > All the best with the testing. > I bought my sofa lime from Global Dive years ago. Presume they are still > selling it. > Alan > > Yahoo Mail: Search, organise, conquer > > > On Tue, 3 Jun 2025 at 10:57 am, via Personal_Submersibles > wrote: > I am finally getting near to a pool test after 15 years. Weeks now not > months. > I have been plagued with CANBUS issues and now trying to get an HMI > interface working for all the sensors, batteries, etc. > Just a couple of questions for the practical people. > > 1. What is the accepted 3 day quantity of sofnolime for 2 people. > 2. What size is recommended for the scrubbers? > 3. Where is the bet place to buy it. > > Regards, > Hugh > > > > -----Original Message----- > From: Personal_Submersibles On > Behalf Of via Personal_Submersibles > Sent: Tuesday, 3 June 2025 4:56 AM > To: personal_submersibles at psubs.org > Subject: Personal_Submersibles Digest, Vol 138, Issue 1 > > Send Personal_Submersibles mailing list submissions to > personal_submersibles at psubs.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles > or, via email, send a message with subject or body 'help' to > personal_submersibles-request at psubs.org > > You can reach the person managing the list at > personal_submersibles-owner at psubs.org > > When replying, please edit your Subject line so it is more specific than > "Re: Contents of Personal_Submersibles digest..." > > > Today's Topics: > > 1. Re: CO2 (Jon Wallace via Personal_Submersibles) > 2. Re: CO2 (Rick Patton via Personal_Submersibles) > 3. Re: CO2 (Alan James via Personal_Submersibles) > 4. buffing (Rick Patton via Personal_Submersibles) > 5. Re: buffing (Jon Wallace via Personal_Submersibles) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 31 May 2025 15:11:29 +0000 (UTC) > From: Jon Wallace via Personal_Submersibles > > To: Personal Submersibles General Discussion > > Subject: Re: [PSUBS-MAILIST] CO2 > Message-ID: <11643796.3454108.1748704289349 at mail.yahoo.com> > Content-Type: text/plain; charset="utf-8" > > Alan will like this, ChatGPT says 0.0523 kg CO2 within 1217 liters (approx > volume of K350) converts to 21,891 ppm.? That corresponds closely to the > empirical results Steve McQueen got with his K-250. > Jon > > On Saturday, May 31, 2025 at 12:28:47 AM EDT, Sean T. Stevenson via > Personal_Submersibles wrote: > > > Per the ABS RULES FOR BUILDING AND CLASSING UNDERWATER VEHICLES, SYSTEMS > AND > HYPERBARIC FACILITIES (2024): > > Section 8 > Life Support and Environmental Control Systems > > 8.5 > Design Principles > > 8.5.5 > Standard Person (2013) > > Carbon Dioxide (CO2) Produced: > 0.0523 (0.115) kg (lbs) per hour at 1 atm. > > Sean > > > > -------- Original Message -------- > On 2025-05-30 20:46, irox via Personal_Submersibles wrote: > > > One consideration. CO2 is heavier than Nitrogen, so it may sink to the > floor, if the meter is near the floor the reading may not be representative > of the actual cabin CO2 level. Also if the meter is somewhere than CO2 can > 'pool' around it reading may be higher. > > ? > > Moving around will also help mix up gases which may help give a more > accurate CO2 reading. > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > < > http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250531/ > 471e2c66/attachment-0001.html> > > ------------------------------ > > Message: 2 > Date: Sat, 31 May 2025 07:42:49 -1000 > From: Rick Patton via Personal_Submersibles > > To: Personal Submersibles General Discussion > > Subject: Re: [PSUBS-MAILIST] CO2 > Message-ID: > > Content-Type: text/plain; charset="utf-8" > > I had the monitor in the middle of the hull so it would give an accurate > reading. I know that Co2 is heavy but what confuses me is the fact that it > rose so fast when lying down and then started dropping when I sat up?? I > have a fan installed in the back for atmosphere circulation while submerged > but it is noisier than I would like but really moves the air around but > might end up using a computer fan, just concerned that I will get the > proper > movement of air. > > Rick > > On Sat, May 31, 2025 at 5:01?AM Jon Wallace via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > > Rick, > > > > If you haven't already I would install some fans to help circulate the > > air. I have two 4inch computer fans, one fore, one aft, that work > > pretty good for this purpose and they draw negligible power. > > > > Jon > > > > > > > > On Friday, May 30, 2025 at 11:47:24 PM EDT, irox via > > Personal_Submersibles wrote: > > > > > > One consideration. CO2 is heavier than Nitrogen, so it may sink to the > > floor, if the meter is near the floor the reading may not be > > representative of the actual cabin CO2 level. Also if the meter is > > somewhere than CO2 can 'pool' around it reading may be higher. > > > > > > > > Moving around will also help mix up gases which may help give a more > > accurate CO2 reading. > > _______________________________________________ > > Personal_Submersibles mailing list > > Personal_Submersibles at psubs.org > > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > > Personal_Submersibles mailing list > > Personal_Submersibles at psubs.org > > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > < > http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250531/ > 6ab5af93/attachment-0001.html> > > ------------------------------ > > Message: 3 > Date: Sat, 31 May 2025 21:12:05 +0000 (UTC) > From: Alan James via Personal_Submersibles > > To: Personal Submersibles General Discussion > > Subject: Re: [PSUBS-MAILIST] CO2 > Message-ID: <1475430295.3543034.1748725926000 at mail.yahoo.com> > Content-Type: text/plain; charset="utf-8" > > Jon, > I get mixed results with chat GPT. > I have the paid version & was advised by an expert to select the 03 variant > that is a lot slower & more thorough, but requires you to be more specific > in your requests. > I asked it to design a scrubber for me but the result was pretty > disappointing. > It is very good at calculations. > Some times it comes up with amazing results, other times you need to > correct > it several times. > Alan > > Yahoo Mail: Search, organise, conquer > > On Sun, 1 Jun 2025 at 1:12 am, Jon Wallace via > Personal_Submersibles wrote: > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > < > http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250531/ > ebdd8dbb/attachment-0001.html> > > ------------------------------ > > Message: 4 > Date: Sun, 1 Jun 2025 09:33:15 -1000 > From: Rick Patton via Personal_Submersibles > > To: psubs chat room > Subject: [PSUBS-MAILIST] buffing > Message-ID: > > Content-Type: text/plain; charset="utf-8" > > Jon, the Novus compound that I ordered for cleaning up a viewport should be > here in a couple of days and was wondering if there was a certain type of > buffing pad you used and should I be concerned about the RPM I use? > > Rick > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > < > http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250601/ > 970f2b21/attachment-0001.html> > > ------------------------------ > > Message: 5 > Date: Mon, 2 Jun 2025 16:55:16 +0000 (UTC) > From: Jon Wallace via Personal_Submersibles > > To: psubs chat room > Subject: Re: [PSUBS-MAILIST] buffing > Message-ID: <321358833.4029036.1748883316841 at mail.yahoo.com> > Content-Type: text/plain; charset="utf-8" > > Rick,? > I don't think the pad actually matters all that much but see link for pads > I > purchased.? Don't mix the compound and pads, use only one compound with > each > pad.? I used the green pad for the coarse polish and yellow pad for the > fine > polish.? Speed also doesn't matter in my opinion, I think I used medium > speed.? Beware of your surroundings however, a motorized buffer with throw > some of the polish around and it's difficult to get off when it dries.? Use > a drop cloth or plastic to protect anything in the vicinity that you don't > want to get polish on.? As well, the polish will get all over your buffer > so > will require some cleanup when you are done. > Amazon.com > > | > | > | | > Amazon.com > > > | > > | > > | > > > > > On Sunday, June 1, 2025 at 03:35:02 PM EDT, Rick Patton via > Personal_Submersibles wrote: > > Jon, the Novus compound?that I ordered for cleaning up a viewport should be > here in a couple of days and was wondering if there was a certain?type of > buffing pad you used and should I be concerned about the RPM I use?? > Rick_______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > < > http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250602/ > b4390ef8/attachment.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles > > > ------------------------------ > > End of Personal_Submersibles Digest, Vol 138, Issue 1 > ***************************************************** > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Jun 3 15:22:00 2025 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Tue, 3 Jun 2025 09:22:00 -1000 Subject: [PSUBS-MAILIST] CO2 In-Reply-To: References: <00f601dbd422$5540d390$ffc27ab0$@gmail.com> <948130669.4260277.1748913896627@mail.yahoo.com> Message-ID: Hi Alec Thanks for the data and the place to buy it. Once you open the 5 gallon bucket for the first time and put the lid back on, does the top layer start to activate or can you open the lid a month or two later and it hasn't skimmed over and start to flash? Rick On Mon, Jun 2, 2025 at 5:10?PM Alec Smyth via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Hi Hugh, > > Congrats! I'm really looking forward to your boat hitting the water. > > 1) The Sofnolime will give you 4 person-hours per pound, so 2 people for 3 > days requires 36 pounds. > 2) There isn't a standard size. Most of us go small because our dives are > relatively short and we don't like throwing out barely-used absorbent. The > rest of the absorvent supply is carried in small containers, ideally ones > that match the size of your scrubbers. > 3) For about 2-3 years now, I've been using this veterinary soda lime: > https://jorvet.com/product/jorvet-soda-lime-5-gallon/ It costs far less > than the "human" absorbent, but the chemistry is just the regular old > soda-lime that's been used for a century. I read up on this a bit and > learned that human CO2 absorbents have been adapted in recent years to deal > with anesthesia that delivered through breathing gases during surgery. It's > color-indicating and the same mesh size as what I used to use before, so no > changes were needed for the scrubbers. > > Best, > Alec > > On Mon, Jun 2, 2025 at 9:25?PM Alan James via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> That's great news Hugh. >> All the best with the testing. >> I bought my sofa lime from Global Dive years ago. Presume they are still >> selling it. >> Alan >> >> Yahoo Mail: Search, organise, conquer >> >> >> On Tue, 3 Jun 2025 at 10:57 am, via Personal_Submersibles >> wrote: >> I am finally getting near to a pool test after 15 years. Weeks now not >> months. >> I have been plagued with CANBUS issues and now trying to get an HMI >> interface working for all the sensors, batteries, etc. >> Just a couple of questions for the practical people. >> >> 1. What is the accepted 3 day quantity of sofnolime for 2 people. >> 2. What size is recommended for the scrubbers? >> 3. Where is the bet place to buy it. >> >> Regards, >> Hugh >> >> >> >> -----Original Message----- >> From: Personal_Submersibles On >> Behalf Of via Personal_Submersibles >> Sent: Tuesday, 3 June 2025 4:56 AM >> To: personal_submersibles at psubs.org >> Subject: Personal_Submersibles Digest, Vol 138, Issue 1 >> >> Send Personal_Submersibles mailing list submissions to >> personal_submersibles at psubs.org >> >> To subscribe or unsubscribe via the World Wide Web, visit >> http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles >> or, via email, send a message with subject or body 'help' to >> personal_submersibles-request at psubs.org >> >> You can reach the person managing the list at >> personal_submersibles-owner at psubs.org >> >> When replying, please edit your Subject line so it is more specific than >> "Re: Contents of Personal_Submersibles digest..." >> >> >> Today's Topics: >> >> 1. Re: CO2 (Jon Wallace via Personal_Submersibles) >> 2. Re: CO2 (Rick Patton via Personal_Submersibles) >> 3. Re: CO2 (Alan James via Personal_Submersibles) >> 4. buffing (Rick Patton via Personal_Submersibles) >> 5. Re: buffing (Jon Wallace via Personal_Submersibles) >> >> >> ---------------------------------------------------------------------- >> >> Message: 1 >> Date: Sat, 31 May 2025 15:11:29 +0000 (UTC) >> From: Jon Wallace via Personal_Submersibles >> >> To: Personal Submersibles General Discussion >> >> Subject: Re: [PSUBS-MAILIST] CO2 >> Message-ID: <11643796.3454108.1748704289349 at mail.yahoo.com> >> Content-Type: text/plain; charset="utf-8" >> >> Alan will like this, ChatGPT says 0.0523 kg CO2 within 1217 liters (approx >> volume of K350) converts to 21,891 ppm.? That corresponds closely to the >> empirical results Steve McQueen got with his K-250. >> Jon >> >> On Saturday, May 31, 2025 at 12:28:47 AM EDT, Sean T. Stevenson via >> Personal_Submersibles wrote: >> >> >> Per the ABS RULES FOR BUILDING AND CLASSING UNDERWATER VEHICLES, SYSTEMS >> AND >> HYPERBARIC FACILITIES (2024): >> >> Section 8 >> Life Support and Environmental Control Systems >> >> 8.5 >> Design Principles >> >> 8.5.5 >> Standard Person (2013) >> >> Carbon Dioxide (CO2) Produced: >> 0.0523 (0.115) kg (lbs) per hour at 1 atm. >> >> Sean >> >> >> >> -------- Original Message -------- >> On 2025-05-30 20:46, irox via Personal_Submersibles wrote: >> >> >> One consideration. CO2 is heavier than Nitrogen, so it may sink to the >> floor, if the meter is near the floor the reading may not be >> representative >> of the actual cabin CO2 level. Also if the meter is somewhere than CO2 can >> 'pool' around it reading may be higher. >> >> ? >> >> Moving around will also help mix up gases which may help give a more >> accurate CO2 reading. >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> < >> http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250531/ >> 471e2c66/attachment-0001.html> >> >> ------------------------------ >> >> Message: 2 >> Date: Sat, 31 May 2025 07:42:49 -1000 >> From: Rick Patton via Personal_Submersibles >> >> To: Personal Submersibles General Discussion >> >> Subject: Re: [PSUBS-MAILIST] CO2 >> Message-ID: >> >> Content-Type: text/plain; charset="utf-8" >> >> I had the monitor in the middle of the hull so it would give an accurate >> reading. I know that Co2 is heavy but what confuses me is the fact that it >> rose so fast when lying down and then started dropping when I sat up?? I >> have a fan installed in the back for atmosphere circulation while >> submerged >> but it is noisier than I would like but really moves the air around but >> might end up using a computer fan, just concerned that I will get the >> proper >> movement of air. >> >> Rick >> >> On Sat, May 31, 2025 at 5:01?AM Jon Wallace via Personal_Submersibles < >> personal_submersibles at psubs.org> wrote: >> >> > Rick, >> > >> > If you haven't already I would install some fans to help circulate the >> > air. I have two 4inch computer fans, one fore, one aft, that work >> > pretty good for this purpose and they draw negligible power. >> > >> > Jon >> > >> > >> > >> > On Friday, May 30, 2025 at 11:47:24 PM EDT, irox via >> > Personal_Submersibles wrote: >> > >> > >> > One consideration. CO2 is heavier than Nitrogen, so it may sink to the >> > floor, if the meter is near the floor the reading may not be >> > representative of the actual cabin CO2 level. Also if the meter is >> > somewhere than CO2 can 'pool' around it reading may be higher. >> > >> > >> > >> > Moving around will also help mix up gases which may help give a more >> > accurate CO2 reading. >> > _______________________________________________ >> > Personal_Submersibles mailing list >> > Personal_Submersibles at psubs.org >> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ >> > Personal_Submersibles mailing list >> > Personal_Submersibles at psubs.org >> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> < >> http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250531/ >> 6ab5af93/attachment-0001.html> >> >> ------------------------------ >> >> Message: 3 >> Date: Sat, 31 May 2025 21:12:05 +0000 (UTC) >> From: Alan James via Personal_Submersibles >> >> To: Personal Submersibles General Discussion >> >> Subject: Re: [PSUBS-MAILIST] CO2 >> Message-ID: <1475430295.3543034.1748725926000 at mail.yahoo.com> >> Content-Type: text/plain; charset="utf-8" >> >> Jon, >> I get mixed results with chat GPT. >> I have the paid version & was advised by an expert to select the 03 >> variant >> that is a lot slower & more thorough, but requires you to be more specific >> in your requests. >> I asked it to design a scrubber for me but the result was pretty >> disappointing. >> It is very good at calculations. >> Some times it comes up with amazing results, other times you need to >> correct >> it several times. >> Alan >> >> Yahoo Mail: Search, organise, conquer >> >> On Sun, 1 Jun 2025 at 1:12 am, Jon Wallace via >> Personal_Submersibles wrote: >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> < >> http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250531/ >> ebdd8dbb/attachment-0001.html> >> >> ------------------------------ >> >> Message: 4 >> Date: Sun, 1 Jun 2025 09:33:15 -1000 >> From: Rick Patton via Personal_Submersibles >> >> To: psubs chat room >> Subject: [PSUBS-MAILIST] buffing >> Message-ID: >> >> Content-Type: text/plain; charset="utf-8" >> >> Jon, the Novus compound that I ordered for cleaning up a viewport should >> be >> here in a couple of days and was wondering if there was a certain type of >> buffing pad you used and should I be concerned about the RPM I use? >> >> Rick >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> < >> http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250601/ >> 970f2b21/attachment-0001.html> >> >> ------------------------------ >> >> Message: 5 >> Date: Mon, 2 Jun 2025 16:55:16 +0000 (UTC) >> From: Jon Wallace via Personal_Submersibles >> >> To: psubs chat room >> Subject: Re: [PSUBS-MAILIST] buffing >> Message-ID: <321358833.4029036.1748883316841 at mail.yahoo.com> >> Content-Type: text/plain; charset="utf-8" >> >> Rick,? >> I don't think the pad actually matters all that much but see link for >> pads I >> purchased.? Don't mix the compound and pads, use only one compound with >> each >> pad.? I used the green pad for the coarse polish and yellow pad for the >> fine >> polish.? Speed also doesn't matter in my opinion, I think I used medium >> speed.? Beware of your surroundings however, a motorized buffer with throw >> some of the polish around and it's difficult to get off when it dries.? >> Use >> a drop cloth or plastic to protect anything in the vicinity that you don't >> want to get polish on.? As well, the polish will get all over your buffer >> so >> will require some cleanup when you are done. >> Amazon.com >> >> | >> | >> | | >> Amazon.com >> >> >> | >> >> | >> >> | >> >> >> >> >> On Sunday, June 1, 2025 at 03:35:02 PM EDT, Rick Patton via >> Personal_Submersibles wrote: >> >> Jon, the Novus compound?that I ordered for cleaning up a viewport should >> be >> here in a couple of days and was wondering if there was a certain?type of >> buffing pad you used and should I be concerned about the RPM I use?? >> Rick_______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> < >> http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250602/ >> b4390ef8/attachment.html> >> >> ------------------------------ >> >> Subject: Digest Footer >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles >> >> >> ------------------------------ >> >> End of Personal_Submersibles Digest, Vol 138, Issue 1 >> ***************************************************** >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Jun 3 16:01:40 2025 From: personal_submersibles at psubs.org (via Personal_Submersibles) Date: Wed, 4 Jun 2025 08:01:40 +1200 Subject: [PSUBS-MAILIST] CO2 In-Reply-To: References: Message-ID: <011f01dbd4c2$540131f0$fc0395d0$@gmail.com> Many thanks Alec, I will chase it up. I have built a Hank type pool and crane for pool testing first. Estimated weight is about 3.8 tons. Regards, Hugh -----Original Message----- From: Personal_Submersibles On Behalf Of via Personal_Submersibles Sent: Tuesday, 3 June 2025 2:45 PM To: personal_submersibles at psubs.org Subject: Personal_Submersibles Digest, Vol 138, Issue 4 Send Personal_Submersibles mailing list submissions to personal_submersibles at psubs.org To subscribe or unsubscribe via the World Wide Web, visit http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles or, via email, send a message with subject or body 'help' to personal_submersibles-request at psubs.org You can reach the person managing the list at personal_submersibles-owner at psubs.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Personal_Submersibles digest..." Today's Topics: 1. Re: CO2 (Alec Smyth via Personal_Submersibles) ---------------------------------------------------------------------- Message: 1 Date: Mon, 2 Jun 2025 22:44:53 -0400 From: Alec Smyth via Personal_Submersibles To: Personal Submersibles General Discussion Subject: Re: [PSUBS-MAILIST] CO2 Message-ID: Content-Type: text/plain; charset="utf-8" Hi Hugh, Congrats! I'm really looking forward to your boat hitting the water. 1) The Sofnolime will give you 4 person-hours per pound, so 2 people for 3 days requires 36 pounds. 2) There isn't a standard size. Most of us go small because our dives are relatively short and we don't like throwing out barely-used absorbent. The rest of the absorvent supply is carried in small containers, ideally ones that match the size of your scrubbers. 3) For about 2-3 years now, I've been using this veterinary soda lime: https://jorvet.com/product/jorvet-soda-lime-5-gallon/ It costs far less than the "human" absorbent, but the chemistry is just the regular old soda-lime that's been used for a century. I read up on this a bit and learned that human CO2 absorbents have been adapted in recent years to deal with anesthesia that delivered through breathing gases during surgery. It's color-indicating and the same mesh size as what I used to use before, so no changes were needed for the scrubbers. Best, Alec On Mon, Jun 2, 2025 at 9:25?PM Alan James via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > That's great news Hugh. > All the best with the testing. > I bought my sofa lime from Global Dive years ago. Presume they are > still selling it. > Alan > > Yahoo Mail: Search, organise, conquer > n_YMktg_315_SearchOrgConquer_EmailSignature&af_sub1=Acquisition&af_sub > 2=US_YMktg&af_sub3=&af_sub4=100002039&af_sub5=C01_Email_Static_&af_ios > _store_cpp=0c38e4b0-a27e-40f9-a211-f4e2de32ab91&af_android_url=https:/ > /play.google.com/store/apps/details?id=com.yahoo.mobile.client.android > .mail&listing=search_organize_conquer> > > On Tue, 3 Jun 2025 at 10:57 am, via Personal_Submersibles > wrote: > I am finally getting near to a pool test after 15 years. Weeks now > not months. > I have been plagued with CANBUS issues and now trying to get an HMI > interface working for all the sensors, batteries, etc. > Just a couple of questions for the practical people. > > 1. What is the accepted 3 day quantity of sofnolime for 2 people. > 2. What size is recommended for the scrubbers? > 3. Where is the bet place to buy it. > > Regards, > Hugh > > > > -----Original Message----- > From: Personal_Submersibles > On Behalf Of via Personal_Submersibles > Sent: Tuesday, 3 June 2025 4:56 AM > To: personal_submersibles at psubs.org > Subject: Personal_Submersibles Digest, Vol 138, Issue 1 > > Send Personal_Submersibles mailing list submissions to > personal_submersibles at psubs.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles > or, via email, send a message with subject or body 'help' to > personal_submersibles-request at psubs.org > > You can reach the person managing the list at > personal_submersibles-owner at psubs.org > > When replying, please edit your Subject line so it is more specific > than > "Re: Contents of Personal_Submersibles digest..." > > > Today's Topics: > > 1. Re: CO2 (Jon Wallace via Personal_Submersibles) > 2. Re: CO2 (Rick Patton via Personal_Submersibles) > 3. Re: CO2 (Alan James via Personal_Submersibles) > 4. buffing (Rick Patton via Personal_Submersibles) > 5. Re: buffing (Jon Wallace via Personal_Submersibles) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 31 May 2025 15:11:29 +0000 (UTC) > From: Jon Wallace via Personal_Submersibles > > To: Personal Submersibles General Discussion > > Subject: Re: [PSUBS-MAILIST] CO2 > Message-ID: <11643796.3454108.1748704289349 at mail.yahoo.com> > Content-Type: text/plain; charset="utf-8" > > Alan will like this, ChatGPT says 0.0523 kg CO2 within 1217 liters > (approx volume of K350) converts to 21,891 ppm.? That corresponds > closely to the empirical results Steve McQueen got with his K-250. > Jon > > On Saturday, May 31, 2025 at 12:28:47 AM EDT, Sean T. Stevenson > via Personal_Submersibles wrote: > > > Per the ABS RULES FOR BUILDING AND CLASSING UNDERWATER VEHICLES, > SYSTEMS AND HYPERBARIC FACILITIES (2024): > > Section 8 > Life Support and Environmental Control Systems > > 8.5 > Design Principles > > 8.5.5 > Standard Person (2013) > > Carbon Dioxide (CO2) Produced: > 0.0523 (0.115) kg (lbs) per hour at 1 atm. > > Sean > > > > -------- Original Message -------- > On 2025-05-30 20:46, irox via Personal_Submersibles wrote: > > > One consideration. CO2 is heavier than Nitrogen, so it may sink to the > floor, if the meter is near the floor the reading may not be > representative of the actual cabin CO2 level. Also if the meter is > somewhere than CO2 can 'pool' around it reading may be higher. > > ? > > Moving around will also help mix up gases which may help give a more > accurate CO2 reading. > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > -------------- next part -------------- An HTML attachment was > scrubbed... > URL: > < > http://www.whoweb.com/pipermail/personal_submersibles/attachments/2025 > 0531/ > 471e2c66/attachment-0001.html> > > ------------------------------ > > Message: 2 > Date: Sat, 31 May 2025 07:42:49 -1000 > From: Rick Patton via Personal_Submersibles > > To: Personal Submersibles General Discussion > > Subject: Re: [PSUBS-MAILIST] CO2 > Message-ID: > > > Content-Type: text/plain; charset="utf-8" > > I had the monitor in the middle of the hull so it would give an > accurate reading. I know that Co2 is heavy but what confuses me is the > fact that it rose so fast when lying down and then started dropping > when I sat up?? I have a fan installed in the back for atmosphere > circulation while submerged but it is noisier than I would like but > really moves the air around but might end up using a computer fan, > just concerned that I will get the proper movement of air. > > Rick > > On Sat, May 31, 2025 at 5:01?AM Jon Wallace via Personal_Submersibles > < personal_submersibles at psubs.org> wrote: > > > Rick, > > > > If you haven't already I would install some fans to help circulate > > the air. I have two 4inch computer fans, one fore, one aft, that > > work pretty good for this purpose and they draw negligible power. > > > > Jon > > > > > > > > On Friday, May 30, 2025 at 11:47:24 PM EDT, irox via > > Personal_Submersibles wrote: > > > > > > One consideration. CO2 is heavier than Nitrogen, so it may sink to > > the floor, if the meter is near the floor the reading may not be > > representative of the actual cabin CO2 level. Also if the meter is > > somewhere than CO2 can 'pool' around it reading may be higher. > > > > > > > > Moving around will also help mix up gases which may help give a more > > accurate CO2 reading. > > _______________________________________________ > > Personal_Submersibles mailing list > > Personal_Submersibles at psubs.org > > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > > Personal_Submersibles mailing list > > Personal_Submersibles at psubs.org > > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > > -------------- next part -------------- An HTML attachment was > scrubbed... > URL: > < > http://www.whoweb.com/pipermail/personal_submersibles/attachments/2025 > 0531/ > 6ab5af93/attachment-0001.html> > > ------------------------------ > > Message: 3 > Date: Sat, 31 May 2025 21:12:05 +0000 (UTC) > From: Alan James via Personal_Submersibles > > To: Personal Submersibles General Discussion > > Subject: Re: [PSUBS-MAILIST] CO2 > Message-ID: <1475430295.3543034.1748725926000 at mail.yahoo.com> > Content-Type: text/plain; charset="utf-8" > > Jon, > I get mixed results with chat GPT. > I have the paid version & was advised by an expert to select the 03 > variant that is a lot slower & more thorough, but requires you to be > more specific in your requests. > I asked it to design a scrubber for me but the result was pretty > disappointing. > It is very good at calculations. > Some times it comes up with amazing results, other times you need to > correct it several times. > Alan > > Yahoo Mail: Search, organise, conquer > > On Sun, 1 Jun 2025 at 1:12 am, Jon Wallace via > Personal_Submersibles wrote: > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > -------------- next part -------------- An HTML attachment was > scrubbed... > URL: > < > http://www.whoweb.com/pipermail/personal_submersibles/attachments/2025 > 0531/ > ebdd8dbb/attachment-0001.html> > > ------------------------------ > > Message: 4 > Date: Sun, 1 Jun 2025 09:33:15 -1000 > From: Rick Patton via Personal_Submersibles > > To: psubs chat room > Subject: [PSUBS-MAILIST] buffing > Message-ID: > > > Content-Type: text/plain; charset="utf-8" > > Jon, the Novus compound that I ordered for cleaning up a viewport > should be here in a couple of days and was wondering if there was a > certain type of buffing pad you used and should I be concerned about the RPM I use? > > Rick > -------------- next part -------------- An HTML attachment was > scrubbed... > URL: > < > http://www.whoweb.com/pipermail/personal_submersibles/attachments/2025 > 0601/ > 970f2b21/attachment-0001.html> > > ------------------------------ > > Message: 5 > Date: Mon, 2 Jun 2025 16:55:16 +0000 (UTC) > From: Jon Wallace via Personal_Submersibles > > To: psubs chat room > Subject: Re: [PSUBS-MAILIST] buffing > Message-ID: <321358833.4029036.1748883316841 at mail.yahoo.com> > Content-Type: text/plain; charset="utf-8" > > Rick,? > I don't think the pad actually matters all that much but see link for > pads I purchased.? Don't mix the compound and pads, use only one > compound with each pad.? I used the green pad for the coarse polish > and yellow pad for the fine polish.? Speed also doesn't matter in my > opinion, I think I used medium speed.? Beware of your surroundings > however, a motorized buffer with throw some of the polish around and > it's difficult to get off when it dries.? Use a drop cloth or plastic > to protect anything in the vicinity that you don't want to get polish > on.? As well, the polish will get all over your buffer so will require > some cleanup when you are done. > Amazon.com > > | > | > | | > Amazon.com > > > | > > | > > | > > > > > On Sunday, June 1, 2025 at 03:35:02 PM EDT, Rick Patton via > Personal_Submersibles wrote: > > Jon, the Novus compound?that I ordered for cleaning up a viewport > should be here in a couple of days and was wondering if there was a > certain?type of buffing pad you used and should I be concerned about the RPM I use?? > Rick_______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > -------------- next part -------------- An HTML attachment was > scrubbed... > URL: > < > http://www.whoweb.com/pipermail/personal_submersibles/attachments/2025 > 0602/ > b4390ef8/attachment.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles > > > ------------------------------ > > End of Personal_Submersibles Digest, Vol 138, Issue 1 > ***************************************************** > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Subject: Digest Footer _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles ------------------------------ End of Personal_Submersibles Digest, Vol 138, Issue 4 ***************************************************** From personal_submersibles at psubs.org Tue Jun 3 17:36:27 2025 From: personal_submersibles at psubs.org (hank pronk via Personal_Submersibles) Date: Tue, 3 Jun 2025 21:36:27 +0000 (UTC) Subject: [PSUBS-MAILIST] CO2 In-Reply-To: <948130669.4260277.1748913896627@mail.yahoo.com> References: <00f601dbd422$5540d390$ffc27ab0$@gmail.com> <948130669.4260277.1748913896627@mail.yahoo.com> Message-ID: <1384920783.4626170.1748986587508@mail.yahoo.com> Hugh, that is good news and we sure look forward to seeing it in operation. ?My DDW has two scrubbers per person, one one each side of the leg tubes. ?I think they did that because there is no room to refill if needed while submerged. ?Like Alec says though, I like small scrubbers that match my dive time. ?It depends on available space and your abilty to refill. ?Hank On Monday, June 2, 2025 at 07:25:17 PM MDT, Alan James via Personal_Submersibles wrote: That's great news Hugh. All the best with the testing. I bought my sofa lime from Global Dive years ago. Presume they are still selling it. Alan Yahoo Mail: Search, organise, conquer On Tue, 3 Jun 2025 at 10:57 am, via Personal_Submersibles wrote: I am finally getting near to a pool test after 15 years.? Weeks now not months. I have been plagued with CANBUS issues and now trying to get an HMI interface working for all the sensors, batteries, etc. Just a couple of questions for the practical people. 1. What is the accepted 3 day quantity of sofnolime for 2 people.? 2. What size is recommended for the scrubbers? 3. Where is the bet place to buy it. Regards, Hugh -----Original Message----- From: Personal_Submersibles On Behalf Of via Personal_Submersibles Sent: Tuesday, 3 June 2025 4:56 AM To: personal_submersibles at psubs.org Subject: Personal_Submersibles Digest, Vol 138, Issue 1 Send Personal_Submersibles mailing list submissions to ??? personal_submersibles at psubs.org To subscribe or unsubscribe via the World Wide Web, visit ??? http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles or, via email, send a message with subject or body 'help' to ??? personal_submersibles-request at psubs.org You can reach the person managing the list at ??? personal_submersibles-owner at psubs.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Personal_Submersibles digest..." Today's Topics: ? 1. Re: CO2 (Jon Wallace via Personal_Submersibles) ? 2. Re: CO2 (Rick Patton via Personal_Submersibles) ? 3. Re: CO2 (Alan James via Personal_Submersibles) ? 4. buffing (Rick Patton via Personal_Submersibles) ? 5. Re: buffing (Jon Wallace via Personal_Submersibles) ---------------------------------------------------------------------- Message: 1 Date: Sat, 31 May 2025 15:11:29 +0000 (UTC) From: Jon Wallace via Personal_Submersibles ??? To: Personal Submersibles General Discussion ??? Subject: Re: [PSUBS-MAILIST] CO2 Message-ID: <11643796.3454108.1748704289349 at mail.yahoo.com> Content-Type: text/plain; charset="utf-8" Alan will like this, ChatGPT says 0.0523 kg CO2 within 1217 liters (approx volume of K350) converts to 21,891 ppm.? That corresponds closely to the empirical results Steve McQueen got with his K-250. Jon ? ? On Saturday, May 31, 2025 at 12:28:47 AM EDT, Sean T. Stevenson via Personal_Submersibles wrote:? Per the ABS RULES FOR BUILDING AND CLASSING UNDERWATER VEHICLES, SYSTEMS AND HYPERBARIC FACILITIES (2024): Section 8 Life Support and Environmental Control Systems 8.5 Design Principles 8.5.5 Standard Person (2013) Carbon Dioxide (CO2) Produced: 0.0523 (0.115) kg (lbs) per hour at 1 atm. Sean -------- Original Message -------- On 2025-05-30 20:46, irox via Personal_Submersibles wrote: One consideration. CO2 is heavier than Nitrogen, so it may sink to the floor, if the meter is near the floor the reading may not be representative of the actual cabin CO2 level. Also if the meter is somewhere than CO2 can 'pool' around it reading may be higher. ? Moving around will also help mix up gases which may help give a more accurate CO2 reading. _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles ? -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 2 Date: Sat, 31 May 2025 07:42:49 -1000 From: Rick Patton via Personal_Submersibles ??? To: Personal Submersibles General Discussion ??? Subject: Re: [PSUBS-MAILIST] CO2 Message-ID: ??? Content-Type: text/plain; charset="utf-8" I had the monitor in the middle of the hull so it would give an accurate reading. I know that Co2 is heavy but what confuses me is the fact that it rose so fast when lying down and then started dropping when I sat up?? I have a fan installed in the back for atmosphere circulation while submerged but it is noisier than I would like but really moves the air around but might end up using a computer fan, just concerned that I will get the proper movement of air. Rick On Sat, May 31, 2025 at 5:01?AM Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, > > If you haven't already I would install some fans to help circulate the > air.? I have two 4inch computer fans, one fore, one aft, that work > pretty good for this purpose and they draw negligible power. > > Jon > > > > On Friday, May 30, 2025 at 11:47:24 PM EDT, irox via > Personal_Submersibles wrote: > > > One consideration. CO2 is heavier than Nitrogen, so it may sink to the > floor, if the meter is near the floor the reading may not be > representative of the actual cabin CO2 level. Also if the meter is > somewhere than CO2 can 'pool' around it reading may be higher. > > > > Moving around will also help mix up gases which may help give a more > accurate CO2 reading. > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 3 Date: Sat, 31 May 2025 21:12:05 +0000 (UTC) From: Alan James via Personal_Submersibles ??? To: Personal Submersibles General Discussion ??? Subject: Re: [PSUBS-MAILIST] CO2 Message-ID: <1475430295.3543034.1748725926000 at mail.yahoo.com> Content-Type: text/plain; charset="utf-8" Jon, I get mixed results with chat GPT. I have the paid version & was advised by an expert to select the 03 variant that is a lot slower & more thorough, but requires you to be more specific in your requests. I asked it to design a scrubber for me but the result was pretty disappointing. It is very good at calculations. Some times it comes up with amazing results, other times you need to correct it several times. Alan Yahoo Mail: Search, organise, conquer ? On Sun, 1 Jun 2025 at 1:12 am, Jon Wallace via Personal_Submersibles wrote: _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles ? -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 4 Date: Sun, 1 Jun 2025 09:33:15 -1000 From: Rick Patton via Personal_Submersibles ??? To: psubs chat room Subject: [PSUBS-MAILIST] buffing Message-ID: ??? Content-Type: text/plain; charset="utf-8" Jon, the Novus compound that I ordered for cleaning up a viewport should be here in a couple of days and was wondering if there was a certain type of buffing pad you used and should I be concerned about the RPM I use? Rick -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 5 Date: Mon, 2 Jun 2025 16:55:16 +0000 (UTC) From: Jon Wallace via Personal_Submersibles ??? To: psubs chat room Subject: Re: [PSUBS-MAILIST] buffing Message-ID: <321358833.4029036.1748883316841 at mail.yahoo.com> Content-Type: text/plain; charset="utf-8" Rick,? I don't think the pad actually matters all that much but see link for pads I purchased.? Don't mix the compound and pads, use only one compound with each pad.? I used the green pad for the coarse polish and yellow pad for the fine polish.? Speed also doesn't matter in my opinion, I think I used medium speed.? Beware of your surroundings however, a motorized buffer with throw some of the polish around and it's difficult to get off when it dries.? Use a drop cloth or plastic to protect anything in the vicinity that you don't want to get polish on.? As well, the polish will get all over your buffer so will require some cleanup when you are done. Amazon.com | | |? | Amazon.com | | | ? ? On Sunday, June 1, 2025 at 03:35:02 PM EDT, Rick Patton via Personal_Submersibles wrote:? Jon, the Novus compound?that I ordered for cleaning up a viewport should be here in a couple of days and was wondering if there was a certain?type of buffing pad you used and should I be concerned about the RPM I use?? Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles ? -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Subject: Digest Footer _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles ------------------------------ End of Personal_Submersibles Digest, Vol 138, Issue 1 ***************************************************** _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Jun 4 08:57:16 2025 From: personal_submersibles at psubs.org (Alec Smyth via Personal_Submersibles) Date: Wed, 4 Jun 2025 08:57:16 -0400 Subject: [PSUBS-MAILIST] CO2 In-Reply-To: References: <00f601dbd422$5540d390$ffc27ab0$@gmail.com> <948130669.4260277.1748913896627@mail.yahoo.com> Message-ID: Hi Rick, I don't have any data on how much opening the container affects the absorbent, but can say that I've never noticed any effect. If you get a big tub of the stuff, you'll be taking the cap on and off a number of times and there does not seem to be any problem at all with that. Just don't leave it uncorked for hours or days! Best, Alec On Tue, Jun 3, 2025 at 3:22?PM Rick Patton via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Hi Alec > > Thanks for the data and the place to buy it. Once you open the 5 gallon > bucket for the first time and put the lid back on, does the top layer start > to activate or can you open the lid a month or two later and it hasn't > skimmed over and start to flash? > > Rick > > On Mon, Jun 2, 2025 at 5:10?PM Alec Smyth via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> Hi Hugh, >> >> Congrats! I'm really looking forward to your boat hitting the water. >> >> 1) The Sofnolime will give you 4 person-hours per pound, so 2 people for >> 3 days requires 36 pounds. >> 2) There isn't a standard size. Most of us go small because our dives are >> relatively short and we don't like throwing out barely-used absorbent. The >> rest of the absorvent supply is carried in small containers, ideally ones >> that match the size of your scrubbers. >> 3) For about 2-3 years now, I've been using this veterinary soda lime: >> https://jorvet.com/product/jorvet-soda-lime-5-gallon/ It costs far less >> than the "human" absorbent, but the chemistry is just the regular old >> soda-lime that's been used for a century. I read up on this a bit and >> learned that human CO2 absorbents have been adapted in recent years to deal >> with anesthesia that delivered through breathing gases during surgery. It's >> color-indicating and the same mesh size as what I used to use before, so no >> changes were needed for the scrubbers. >> >> Best, >> Alec >> >> On Mon, Jun 2, 2025 at 9:25?PM Alan James via Personal_Submersibles < >> personal_submersibles at psubs.org> wrote: >> >>> That's great news Hugh. >>> All the best with the testing. >>> I bought my sofa lime from Global Dive years ago. Presume they are still >>> selling it. >>> Alan >>> >>> Yahoo Mail: Search, organise, conquer >>> >>> >>> On Tue, 3 Jun 2025 at 10:57 am, via Personal_Submersibles >>> wrote: >>> I am finally getting near to a pool test after 15 years. Weeks now not >>> months. >>> I have been plagued with CANBUS issues and now trying to get an HMI >>> interface working for all the sensors, batteries, etc. >>> Just a couple of questions for the practical people. >>> >>> 1. What is the accepted 3 day quantity of sofnolime for 2 people. >>> 2. What size is recommended for the scrubbers? >>> 3. Where is the bet place to buy it. >>> >>> Regards, >>> Hugh >>> >>> >>> >>> -----Original Message----- >>> From: Personal_Submersibles On >>> Behalf Of via Personal_Submersibles >>> Sent: Tuesday, 3 June 2025 4:56 AM >>> To: personal_submersibles at psubs.org >>> Subject: Personal_Submersibles Digest, Vol 138, Issue 1 >>> >>> Send Personal_Submersibles mailing list submissions to >>> personal_submersibles at psubs.org >>> >>> To subscribe or unsubscribe via the World Wide Web, visit >>> http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles >>> or, via email, send a message with subject or body 'help' to >>> personal_submersibles-request at psubs.org >>> >>> You can reach the person managing the list at >>> personal_submersibles-owner at psubs.org >>> >>> When replying, please edit your Subject line so it is more specific than >>> "Re: Contents of Personal_Submersibles digest..." >>> >>> >>> Today's Topics: >>> >>> 1. Re: CO2 (Jon Wallace via Personal_Submersibles) >>> 2. Re: CO2 (Rick Patton via Personal_Submersibles) >>> 3. Re: CO2 (Alan James via Personal_Submersibles) >>> 4. buffing (Rick Patton via Personal_Submersibles) >>> 5. Re: buffing (Jon Wallace via Personal_Submersibles) >>> >>> >>> ---------------------------------------------------------------------- >>> >>> Message: 1 >>> Date: Sat, 31 May 2025 15:11:29 +0000 (UTC) >>> From: Jon Wallace via Personal_Submersibles >>> >>> To: Personal Submersibles General Discussion >>> >>> Subject: Re: [PSUBS-MAILIST] CO2 >>> Message-ID: <11643796.3454108.1748704289349 at mail.yahoo.com> >>> Content-Type: text/plain; charset="utf-8" >>> >>> Alan will like this, ChatGPT says 0.0523 kg CO2 within 1217 liters >>> (approx >>> volume of K350) converts to 21,891 ppm.? That corresponds closely to the >>> empirical results Steve McQueen got with his K-250. >>> Jon >>> >>> On Saturday, May 31, 2025 at 12:28:47 AM EDT, Sean T. Stevenson via >>> Personal_Submersibles wrote: >>> >>> >>> Per the ABS RULES FOR BUILDING AND CLASSING UNDERWATER VEHICLES, SYSTEMS >>> AND >>> HYPERBARIC FACILITIES (2024): >>> >>> Section 8 >>> Life Support and Environmental Control Systems >>> >>> 8.5 >>> Design Principles >>> >>> 8.5.5 >>> Standard Person (2013) >>> >>> Carbon Dioxide (CO2) Produced: >>> 0.0523 (0.115) kg (lbs) per hour at 1 atm. >>> >>> Sean >>> >>> >>> >>> -------- Original Message -------- >>> On 2025-05-30 20:46, irox via Personal_Submersibles wrote: >>> >>> >>> One consideration. CO2 is heavier than Nitrogen, so it may sink to the >>> floor, if the meter is near the floor the reading may not be >>> representative >>> of the actual cabin CO2 level. Also if the meter is somewhere than CO2 >>> can >>> 'pool' around it reading may be higher. >>> >>> ? >>> >>> Moving around will also help mix up gases which may help give a more >>> accurate CO2 reading. >>> >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >>> -------------- next part -------------- >>> An HTML attachment was scrubbed... >>> URL: >>> < >>> http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250531/ >>> 471e2c66/attachment-0001.html> >>> >>> ------------------------------ >>> >>> Message: 2 >>> Date: Sat, 31 May 2025 07:42:49 -1000 >>> From: Rick Patton via Personal_Submersibles >>> >>> To: Personal Submersibles General Discussion >>> >>> Subject: Re: [PSUBS-MAILIST] CO2 >>> Message-ID: >>> >>> Content-Type: text/plain; charset="utf-8" >>> >>> I had the monitor in the middle of the hull so it would give an accurate >>> reading. I know that Co2 is heavy but what confuses me is the fact that >>> it >>> rose so fast when lying down and then started dropping when I sat up?? I >>> have a fan installed in the back for atmosphere circulation while >>> submerged >>> but it is noisier than I would like but really moves the air around but >>> might end up using a computer fan, just concerned that I will get the >>> proper >>> movement of air. >>> >>> Rick >>> >>> On Sat, May 31, 2025 at 5:01?AM Jon Wallace via Personal_Submersibles < >>> personal_submersibles at psubs.org> wrote: >>> >>> > Rick, >>> > >>> > If you haven't already I would install some fans to help circulate the >>> > air. I have two 4inch computer fans, one fore, one aft, that work >>> > pretty good for this purpose and they draw negligible power. >>> > >>> > Jon >>> > >>> > >>> > >>> > On Friday, May 30, 2025 at 11:47:24 PM EDT, irox via >>> > Personal_Submersibles wrote: >>> > >>> > >>> > One consideration. CO2 is heavier than Nitrogen, so it may sink to the >>> > floor, if the meter is near the floor the reading may not be >>> > representative of the actual cabin CO2 level. Also if the meter is >>> > somewhere than CO2 can 'pool' around it reading may be higher. >>> > >>> > >>> > >>> > Moving around will also help mix up gases which may help give a more >>> > accurate CO2 reading. >>> > _______________________________________________ >>> > Personal_Submersibles mailing list >>> > Personal_Submersibles at psubs.org >>> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> > _______________________________________________ >>> > Personal_Submersibles mailing list >>> > Personal_Submersibles at psubs.org >>> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> > >>> -------------- next part -------------- >>> An HTML attachment was scrubbed... >>> URL: >>> < >>> http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250531/ >>> 6ab5af93/attachment-0001.html> >>> >>> ------------------------------ >>> >>> Message: 3 >>> Date: Sat, 31 May 2025 21:12:05 +0000 (UTC) >>> From: Alan James via Personal_Submersibles >>> >>> To: Personal Submersibles General Discussion >>> >>> Subject: Re: [PSUBS-MAILIST] CO2 >>> Message-ID: <1475430295.3543034.1748725926000 at mail.yahoo.com> >>> Content-Type: text/plain; charset="utf-8" >>> >>> Jon, >>> I get mixed results with chat GPT. >>> I have the paid version & was advised by an expert to select the 03 >>> variant >>> that is a lot slower & more thorough, but requires you to be more >>> specific >>> in your requests. >>> I asked it to design a scrubber for me but the result was pretty >>> disappointing. >>> It is very good at calculations. >>> Some times it comes up with amazing results, other times you need to >>> correct >>> it several times. >>> Alan >>> >>> Yahoo Mail: Search, organise, conquer >>> >>> On Sun, 1 Jun 2025 at 1:12 am, Jon Wallace via >>> Personal_Submersibles wrote: >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >>> -------------- next part -------------- >>> An HTML attachment was scrubbed... >>> URL: >>> < >>> http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250531/ >>> ebdd8dbb/attachment-0001.html> >>> >>> ------------------------------ >>> >>> Message: 4 >>> Date: Sun, 1 Jun 2025 09:33:15 -1000 >>> From: Rick Patton via Personal_Submersibles >>> >>> To: psubs chat room >>> Subject: [PSUBS-MAILIST] buffing >>> Message-ID: >>> >>> Content-Type: text/plain; charset="utf-8" >>> >>> Jon, the Novus compound that I ordered for cleaning up a viewport should >>> be >>> here in a couple of days and was wondering if there was a certain type of >>> buffing pad you used and should I be concerned about the RPM I use? >>> >>> Rick >>> -------------- next part -------------- >>> An HTML attachment was scrubbed... >>> URL: >>> < >>> http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250601/ >>> 970f2b21/attachment-0001.html> >>> >>> ------------------------------ >>> >>> Message: 5 >>> Date: Mon, 2 Jun 2025 16:55:16 +0000 (UTC) >>> From: Jon Wallace via Personal_Submersibles >>> >>> To: psubs chat room >>> Subject: Re: [PSUBS-MAILIST] buffing >>> Message-ID: <321358833.4029036.1748883316841 at mail.yahoo.com> >>> Content-Type: text/plain; charset="utf-8" >>> >>> Rick,? >>> I don't think the pad actually matters all that much but see link for >>> pads I >>> purchased.? Don't mix the compound and pads, use only one compound with >>> each >>> pad.? I used the green pad for the coarse polish and yellow pad for the >>> fine >>> polish.? Speed also doesn't matter in my opinion, I think I used medium >>> speed.? Beware of your surroundings however, a motorized buffer with >>> throw >>> some of the polish around and it's difficult to get off when it dries.? >>> Use >>> a drop cloth or plastic to protect anything in the vicinity that you >>> don't >>> want to get polish on.? As well, the polish will get all over your >>> buffer so >>> will require some cleanup when you are done. >>> Amazon.com >>> >>> | >>> | >>> | | >>> Amazon.com >>> >>> >>> | >>> >>> | >>> >>> | >>> >>> >>> >>> >>> On Sunday, June 1, 2025 at 03:35:02 PM EDT, Rick Patton via >>> Personal_Submersibles wrote: >>> >>> Jon, the Novus compound?that I ordered for cleaning up a viewport should >>> be >>> here in a couple of days and was wondering if there was a certain?type of >>> buffing pad you used and should I be concerned about the RPM I use?? >>> Rick_______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >>> -------------- next part -------------- >>> An HTML attachment was scrubbed... >>> URL: >>> < >>> http://www.whoweb.com/pipermail/personal_submersibles/attachments/20250602/ >>> b4390ef8/attachment.html> >>> >>> ------------------------------ >>> >>> Subject: Digest Footer >>> >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles >>> >>> >>> ------------------------------ >>> >>> End of Personal_Submersibles Digest, Vol 138, Issue 1 >>> ***************************************************** >>> >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... 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