From personal_submersibles at psubs.org Wed Oct 1 07:16:00 2025 From: personal_submersibles at psubs.org (James Frankland via Personal_Submersibles) Date: Wed, 1 Oct 2025 12:16:00 +0100 Subject: [PSUBS-MAILIST] 302 v 316 stainless for springs In-Reply-To: References: <1513881012.2271849.1759237962253@mail.yahoo.com> Message-ID: Hi both. Thanks for the advice. I am still awaiting final quotes, but I suspect i may well go for 302. 316 is very expensive. I will probably cover the springs in laquear. Someone gave me my K350 springs. It was a guy in USA. So they could well be 302 and ive never had any issues with them. They are laquered. Regards James On Tue, 30 Sept 2025 at 19:59, Rick Patton via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Hey James, I think you'll be fine with that grade as long as you wash it > well after every dive. It will haze like some other grades above it but the > haze is only on the surface unless it was never washed but for the cost of > the 316-L, I would think that 302 is OK. If the haze gets really bad, you > could pickle them but would have to take them off of course for that. > > Rick > > On Tue, Sep 30, 2025 at 3:13?AM Cliff Redus via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> James, your dive environment is different from most psubbers, being >> exclusively salt water. I don't have any experience with using 302 >> stainless steel for hatch springs, but for both the R300 and R400, I use spring-tempered >> steel wire, ASTM A229, that I have power-coated. This has not been an >> issue for the 10 years I have been operating the R300. Yes, 316 stainless >> would be the ideal case but given that we don't put these in the water that >> often and always rinse them off after dives, I would not have a problem >> with using 302 SS. While 302 stainless steel is prone to pitting in >> saltwater, the consequences of failure are low. If pitting occurs to the >> point that the spring breaks, you lose some support against the weight of >> the hatch. This is not a big deal. It is not worth spending excessively on >> the 316SS for this application. >> >> Best >> >> Cliff >> >> On Tuesday, September 30, 2025 at 07:39:00 AM CDT, James Frankland via >> Personal_Submersibles wrote: >> >> >> Hi All >> >> Im struggling to get hatch springs made at a decent price. >> >> Has anyone used 302 stainless in a salt water environment. I know its >> not the right material, and not supposed to be used in salt water, but they >> are so much cheaper and readily available. >> >> I could possibly coat them in some sort of lacquer or even just replace >> them every dive. They really are that much cheaper. >> >> Im still trying to get 316. >> >> Anyone used 302 springs in the sea? Did they disintegrate? >> >> >> >> Regards >> James >> _______________________________________________ >> 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 Wed Oct 1 10:32:22 2025 From: personal_submersibles at psubs.org (via Personal_Submersibles) Date: Wed, 1 Oct 2025 16:32:22 +0200 Subject: [PSUBS-MAILIST] 302 v 316 stainless for springs In-Reply-To: References: <1513881012.2271849.1759237962253@mail.yahoo.com> Message-ID: <00a401dc32e0$33651d40$9a2f57c0$@airesearch.nl> Hi James, Bit late reply but SS316 is likely to soft for springs. 316 has a yield strength of 250 N/mm2 and spring steel 1500 N/mm2 Br, Emile Van: Personal_Submersibles Namens James Frankland via Personal_Submersibles Verzonden: woensdag 1 oktober 2025 13:16 Aan: Personal Submersibles General Discussion Onderwerp: Re: [PSUBS-MAILIST] 302 v 316 stainless for springs Hi both. Thanks for the advice. I am still awaiting final quotes, but I suspect i may well go for 302. 316 is very expensive. I will probably cover the springs in laquear. Someone gave me my K350 springs. It was a guy in USA. So they could well be 302 and ive never had any issues with them. They are laquered. Regards James On Tue, 30 Sept 2025 at 19:59, Rick Patton via Personal_Submersibles > wrote: Hey James, I think you'll be fine with that grade as long as you wash it well after every dive. It will haze like some other grades above it but the haze is only on the surface unless it was never washed but for the cost of the 316-L, I would think that 302 is OK. If the haze gets really bad, you could pickle them but would have to take them off of course for that. Rick On Tue, Sep 30, 2025 at 3:13?AM Cliff Redus via Personal_Submersibles > wrote: James, your dive environment is different from most psubbers, being exclusively salt water. I don't have any experience with using 302 stainless steel for hatch springs, but for both the R300 and R400, I use spring-tempered steel wire, ASTM A229, that I have power-coated. This has not been an issue for the 10 years I have been operating the R300. Yes, 316 stainless would be the ideal case but given that we don't put these in the water that often and always rinse them off after dives, I would not have a problem with using 302 SS. While 302 stainless steel is prone to pitting in saltwater, the consequences of failure are low. If pitting occurs to the point that the spring breaks, you lose some support against the weight of the hatch. This is not a big deal. It is not worth spending excessively on the 316SS for this application. Best Cliff On Tuesday, September 30, 2025 at 07:39:00 AM CDT, James Frankland via Personal_Submersibles > wrote: Hi All Im struggling to get hatch springs made at a decent price. Has anyone used 302 stainless in a salt water environment. I know its not the right material, and not supposed to be used in salt water, but they are so much cheaper and readily available. I could possibly coat them in some sort of lacquer or even just replace them every dive. They really are that much cheaper. Im still trying to get 316. Anyone used 302 springs in the sea? Did they disintegrate? Regards James _______________________________________________ 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 Oct 6 20:48:08 2025 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Mon, 6 Oct 2025 14:48:08 -1000 Subject: [PSUBS-MAILIST] question In-Reply-To: <1081762494.2078958.1759185279105@mail.yahoo.com> References: <1429587299.91.1759180339411@mail.yahoo.com> <1081762494.2078958.1759185279105@mail.yahoo.com> Message-ID: Hi Alan, couple of questions,, I don't understand what you mean by "Changing the red and black? when you say "put the probe on the side one and middle one and should get 5V, what position should the potentiometer be in? neutral or full ahead or astearn? also, when I energise the potentiometer, the motor just goes full tilt in one direction so I assume it has to be energised to look for that reading? Rick On Mon, Sep 29, 2025 at 12:35?PM Alan James via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, you can just try out the wires in different positions, you won't do > any damage. > Normally you have a black & a red wire & they go on the far left & far > right pin, and a coloured wire goes on the middle pin. > Start with the coloured wire in the middle first & change the red and > black. > If that fails you can check that the potentiometer is working with a multi > meter. > If you put the probe of the meter on one of the outside pins & the other > probe on the middle pin, you should see the voltage vary from 0 to 5V. Or > sometimes 0-3.5V. > You could look inside the black box & see if the wires have come off in > there. > All the best. > Alan > > Yahoo Mail: Search, organise, conquer > > > On Tue, 30 Sept 2025 at 11:23 am, Rick Patton 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 Oct 6 21:10:04 2025 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Tue, 7 Oct 2025 01:10:04 +0000 (UTC) Subject: [PSUBS-MAILIST] question In-Reply-To: References: <1429587299.91.1759180339411@mail.yahoo.com> <1081762494.2078958.1759185279105@mail.yahoo.com> Message-ID: <780961740.156792.1759799404866@mail.yahoo.com> Rick, the easy option is to take the 3 wires off the potentiometer & switch them around turning the pot on each change. Take you 10 minutes.?If none of those combinations work then it could be the pot. You could switch it out with?your other one.?If it doesn't work with the pot that you know is good, then you would need to look inside the?Motor controllers. Check that none of the wires are disconnected or broken. Cliff gave a good description of how they work with the mid position on the dial being off.Let me know how you get on.Alan Yahoo Mail: Search, organise, conquer On Tue, 7 Oct 2025 at 1:50 pm, Rick Patton via Personal_Submersibles wrote: Hi Alan, couple of questions,, I don't understand what you mean by "Changing the red and black? when you say "put the probe on the side one and middle one and should get 5V, what position should the potentiometer be in? neutral or full ahead or astearn??also, when I energise the potentiometer, the motor just goes full tilt in one direction?so I assume it has to be energised to look for that reading? Rick On Mon, Sep 29, 2025 at 12:35?PM Alan James via Personal_Submersibles wrote: Rick, you can just try out the wires in different positions, you won't do any damage.Normally you have a black & a red wire & they go on the far left & far right pin, and a coloured wire goes on the middle pin.?Start with the coloured wire in the middle first & change the red and black.If that fails you can check that the potentiometer is working with a multi meter.If you put the probe of the meter on one of the outside pins & the other probe on the middle pin, you should see the voltage vary from 0 to 5V. Or sometimes 0-3.5V.You could look inside the black box & see if the wires have come off in there.All the best.Alan Yahoo Mail: Search, organise, conquer On Tue, 30 Sept 2025 at 11:23 am, Rick Patton 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 Oct 6 21:51:04 2025 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Tue, 7 Oct 2025 01:51:04 +0000 (UTC) Subject: [PSUBS-MAILIST] question In-Reply-To: References: <1429587299.91.1759180339411@mail.yahoo.com> <1081762494.2078958.1759185279105@mail.yahoo.com> Message-ID: <377830728.174586.1759801864597@mail.yahoo.com> Rick, Select the OHMS setting on your multimeter, then connect one probe from the multimeter?(it doesn't matter which one) to the center connector on the POT.?? Test-1, connect the other probe from the multimeter to the left connector on the POT.? Turn the potentiometer in both directions and observe the results on the multimeter.? The displayed number on the multimeter should be large (5-10k) in one direction and small (near zero) in the other.?? Test-2, remove the probe from the left connector and attach it to the right connector on the POT.??Turn the potentiometer in both directions and observe the results on the multimeter.? The displayed number on the multimeter should be large (5-10k) in one direction and small (near zero) in the other. If in both cases you have observed a large range, for example 10000-0, or 0-10000, then your POT is functioning correctly.? Any other result is indicative of a defective POT.? Note that this specific example assumes your potentiometer is rated at 10k.? If you have a 5k potentiometer the maximum value you will see is 5000. Jon On Monday, October 6, 2025 at 08:50:00 PM EDT, Rick Patton via Personal_Submersibles wrote: Hi Alan, couple of questions,, I don't understand what you mean by "Changing the red and black? when you say "put the probe on the side one and middle one and should get 5V, what position should the potentiometer be in? neutral or full ahead or astearn?? also, when I energise the potentiometer, the motor just goes full tilt in one direction? so I assume it has to be energised to look for that reading? Rick From personal_submersibles at psubs.org Tue Oct 7 09:08:33 2025 From: personal_submersibles at psubs.org (Cliff Redus via Personal_Submersibles) Date: Tue, 7 Oct 2025 13:08:33 +0000 (UTC) Subject: [PSUBS-MAILIST] question In-Reply-To: References: <1429587299.91.1759180339411@mail.yahoo.com> <1081762494.2078958.1759185279105@mail.yahoo.com> Message-ID: <501663578.288997.1759842513801@mail.yahoo.com> Rick, these Minn Kota trolling motors are simple brushed DCmotors.? Let?s assume you are using a 36V trolling motor and a Minn- Kotamotor controller.? ? ?If you completely disconnect the motorcontroller from the motor, then if you connected the motor to a 36V bank, thenthe motor will run full speed in one direction.? If you reverse thepolarity to the motor , it will run full speed in the opposite direction.?? Because you note that when you energize the potentiometer, the motorcomes on full speed in one direction, this means that motor controller issupplying either a 5V signal or 0V signal to the motor.? These Minn-Kotamotor controllers have two connections for the battery bank and two connectionsfor the motor.? They also have three conductors for the potentiometer.?One of the connections is a regulated 5V power supply, one is the ground andthe third goes to the swiper leg of the potentiometer.? This swiper leg isan input to the motor controller.? If you supply 5V to this swiper leg,then the motor will run full speed in one direction, if you supply 0V to thisswiper connection, then the motor will run full speed in the opposite directionand if you supply 2.5V to this swiper connection to the motor controller, thenthe motor will be off.? So, either the motor controller is faulty or the potentiometeris faulty assuming you have connected the potentiometer correctly to the motorcontroller.? Since your motor is coming on when you energize the potentiometer,you know the 5V power supply from the motor controller is working.? ?You can trouble shoot the potentiometer by connecting the multimeter probes tothe outer legs of the three leg potentiometer and energizing the potentiometer.?The motor will come on and the multimeter will either read 5V or -5V.?From this, you can deduce which is ground and which is the 5V powersupply.? Next connect the ground probe of multimeter to the ground leg ofthe potentiometer and connect the multimeter positive probe to the swiper ormiddle leg of the potentiometer.? Energize the potentiometer and rotatethe potentiometer.? If the potentiometer is working, the voltage willrange from 0-5V and the motor will go from full one direction to full the otherdirection and stop when the multimeter is near 2.5V.? If from this testyou do not see the variation of voltage from 0-5V, then the potentiometer isbad.? If you? do see the swiper leg voltage move from 0-5V when youturn it and the motor is not changing, then you have a bad motorcontroller.? ?I have had these motor controller go bad in thepast.? Hope this helps. Cliff On Monday, October 6, 2025 at 08:14:24 PM CDT, Rick Patton via Personal_Submersibles wrote: Hi Alan, couple of questions,, I don't understand what you mean by "Changing the red and black? when you say "put the probe on the side one and middle one and should get 5V, what position should the potentiometer be in? neutral or full ahead or astearn??also, when I energise the potentiometer, the motor just goes full tilt in one direction?so I assume it has to be energised to look for that reading? Rick On Mon, Sep 29, 2025 at 12:35?PM Alan James via Personal_Submersibles wrote: Rick, you can just try out the wires in different positions, you won't do any damage.Normally you have a black & a red wire & they go on the far left & far right pin, and a coloured wire goes on the middle pin.?Start with the coloured wire in the middle first & change the red and black.If that fails you can check that the potentiometer is working with a multi meter.If you put the probe of the meter on one of the outside pins & the other probe on the middle pin, you should see the voltage vary from 0 to 5V. Or sometimes 0-3.5V.You could look inside the black box & see if the wires have come off in there.All the best.Alan Yahoo Mail: Search, organise, conquer On Tue, 30 Sept 2025 at 11:23 am, Rick Patton 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 Tue Oct 14 10:34:06 2025 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Tue, 14 Oct 2025 14:34:06 +0000 (UTC) Subject: [PSUBS-MAILIST] SHOCK!! References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> Message-ID: <1820929143.2766298.1760452446581@mail.yahoo.com> Not shocking, just shocks.? Just completed a road trip with Aquatic in tow and it is very bouncy especially over bridge transitions and a couple of times I'm sure the entire trailer actually came off the ground a few inches.? In some instances it induces a type of "porpoise" effect through the hitch between the truck and trailer.? I'm thinking about adding shocks to help control the bouncing and wondering if anyone else has them on their trailer. Jon From personal_submersibles at psubs.org Tue Oct 14 13:38:58 2025 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Tue, 14 Oct 2025 17:38:58 +0000 Subject: [PSUBS-MAILIST] SHOCK!! In-Reply-To: <1820929143.2766298.1760452446581@mail.yahoo.com> References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> <1820929143.2766298.1760452446581@mail.yahoo.com> Message-ID: What percentage tongue load? Sean -------- Original Message -------- On Tuesday, 10/14/25 at 07:35 Jon Wallace via Personal_Submersibles wrote: Not shocking, just shocks.? Just completed a road trip with Aquatic in tow and it is very bouncy especially over bridge transitions and a couple of times I'm sure the entire trailer actually came off the ground a few inches.? In some instances it induces a type of "porpoise" effect through the hitch between the truck and trailer.? I'm thinking about adding shocks to help control the bouncing and wondering if anyone else has them on their trailer. Jon _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles From personal_submersibles at psubs.org Tue Oct 14 13:34:09 2025 From: personal_submersibles at psubs.org (VANCE BRADLEY via Personal_Submersibles) Date: Tue, 14 Oct 2025 13:34:09 -0400 Subject: [PSUBS-MAILIST] SHOCK!! In-Reply-To: <1820929143.2766298.1760452446581@mail.yahoo.com> References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> <1820929143.2766298.1760452446581@mail.yahoo.com> Message-ID: <09C6124C-CD36-43C8-9AE2-589FDA2D9739@aol.com> Sounds like too much spring, or not nearly enough. Vance > On Oct 14, 2025, at 10:34 AM, Jon Wallace via Personal_Submersibles wrote: > > Not shocking, just shocks. Just completed a road trip with Aquatic in tow and it is very bouncy especially over bridge transitions and a couple of times I'm sure the entire trailer actually came off the ground a few inches. In some instances it induces a type of "porpoise" effect through the hitch between the truck and trailer. I'm thinking about adding shocks to help control the bouncing and wondering if anyone else has them on their trailer. > > Jon > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles From personal_submersibles at psubs.org Tue Oct 14 14:26:45 2025 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Tue, 14 Oct 2025 18:26:45 +0000 (UTC) Subject: [PSUBS-MAILIST] SHOCK!! In-Reply-To: <1820929143.2766298.1760452446581@mail.yahoo.com> References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> <1820929143.2766298.1760452446581@mail.yahoo.com> Message-ID: <857972843.2883512.1760466405457@mail.yahoo.com> What speed were you doing? Yahoo Mail: Search, organise, conquer On Wed, 15 Oct 2025 at 3:36 am, Jon Wallace via Personal_Submersibles wrote: Not shocking, just shocks.? Just completed a road trip with Aquatic in tow and it is very bouncy especially over bridge transitions and a couple of times I'm sure the entire trailer actually came off the ground a few inches.? In some instances it induces a type of "porpoise" effect through the hitch between the truck and trailer.? I'm thinking about adding shocks to help control the bouncing and wondering if anyone else has them on their trailer. Jon _______________________________________________ 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 Oct 14 14:39:49 2025 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Tue, 14 Oct 2025 08:39:49 -1000 Subject: [PSUBS-MAILIST] SHOCK!! In-Reply-To: <09C6124C-CD36-43C8-9AE2-589FDA2D9739@aol.com> References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> <1820929143.2766298.1760452446581@mail.yahoo.com> <09C6124C-CD36-43C8-9AE2-589FDA2D9739@aol.com> Message-ID: I've got torsion axles (springs inside the axle) and she tows quite nicely. I went with the 10% theory so I've got around a 400 lb tongue weight. FYI, my potentiometer was bad so she works like a charm now. The first launching should be in a couple of days now.! Rick On Tue, Oct 14, 2025 at 8:15?AM VANCE BRADLEY via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Sounds like too much spring, or not nearly enough. > Vance > > > > On Oct 14, 2025, at 10:34 AM, Jon Wallace via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > > > Not shocking, just shocks. Just completed a road trip with Aquatic in > tow and it is very bouncy especially over bridge transitions and a couple > of times I'm sure the entire trailer actually came off the ground a few > inches. In some instances it induces a type of "porpoise" effect through > the hitch between the truck and trailer. I'm thinking about adding shocks > to help control the bouncing and wondering if anyone else has them on their > trailer. > > > > Jon > > > > _______________________________________________ > > 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 Oct 14 14:50:52 2025 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Tue, 14 Oct 2025 18:50:52 +0000 (UTC) Subject: [PSUBS-MAILIST] SHOCK!! In-Reply-To: References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> <1820929143.2766298.1760452446581@mail.yahoo.com> <09C6124C-CD36-43C8-9AE2-589FDA2D9739@aol.com> Message-ID: <1456024082.2893784.1760467852380@mail.yahoo.com> Great news about the potentiometer Rick.Look forward to the dive report & any videos.Alan Yahoo Mail: Search, organise, conquer On Wed, 15 Oct 2025 at 7:41 am, Rick Patton 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: From personal_submersibles at psubs.org Tue Oct 14 15:25:08 2025 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Tue, 14 Oct 2025 19:25:08 +0000 (UTC) Subject: [PSUBS-MAILIST] SHOCK!! In-Reply-To: <1820929143.2766298.1760452446581@mail.yahoo.com> References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> <1820929143.2766298.1760452446581@mail.yahoo.com> Message-ID: <743402718.2930662.1760469908991@mail.yahoo.com> Speed...highway speeds, 65-70mph, 104-112kph. Tongue weight...that's a long story.? It's a dual axle (tandom) and was originally 10% with the submarine loaded slightly forward of the front axle.? But this resulted in the equalizer (between spring sets) being offset toward the front axle, not "equal".? The result was about 6mm of clearance at the front side of the equalizer and 3-4 inches of clearance at the back side of the equalizer, causing the trailer frame to bang hard against the equalizer when going over the slightest bump.? On a long trip it wouldn't last long.? To combat this, I slid the submarine rearward until the equalizer was equally spaced from the frame on both sides which results in the submarine being positioned directly over both axles.? This solved the frame banging on the equalizer since there was now enough distance (about 2-3 inches) between both ends of the equalizer and the frame.? However, in this configuration because the submarine is directly over both axles the tongue weight is near zero (maybe 25 pounds at most).? I can literally pick up the tongue and rock the trailer up and down.? I took it this way to Michigan and the trailer still tracked very well with zero sway, but it resulted in a bumpy ride at the hitch which made for a rough ride inside the truck.? Since that trip and prior to heading south this week, I added about 250 pounds in front of the submarine but behind the hitch.? I did not measure but I'm guessing my tongue weight is now somewhere around 3-4%, still low, I know, but it was enough to result in a much smoother ride and I did not notice any lifting or bumping at the hitch.? The remaining issue is that when traveling at highway speeds and traversing a large enough pothole, or transition from road to bridge where in many cases there is a mismatch in road level (think speed bump) the energy will cause significant bouncing up and down of the trailer at the wheels.? Sometimes looks like a pogo stick in the rear view mirror. I can't change the position of the submarine or else the equalizer between springs won't be equal and I'll risk severe banging of the equalizer parts against the frame of the trailer.? I know that will cause failure of bolts and other parts eventually.? I could add more weight at the front to get more tongue weight, but even with my original configuration that gave me 10% tongue weight (I measured it) the bouncing of the trailer was still significant over a large bump.? There's just a LOT of weight (4500) lbs concentrated in a relatively small area over the axles. Jon From personal_submersibles at psubs.org Tue Oct 14 18:22:01 2025 From: personal_submersibles at psubs.org (via Personal_Submersibles) Date: Tue, 14 Oct 2025 22:22:01 +0000 (UTC) Subject: [PSUBS-MAILIST] SHOCK!! In-Reply-To: <743402718.2930662.1760469908991@mail.yahoo.com> References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> <1820929143.2766298.1760452446581@mail.yahoo.com> <743402718.2930662.1760469908991@mail.yahoo.com> Message-ID: <1576697266.1632730.1760480521728@mail.yahoo.com> Jon, ?A huge concern could be what might happen if you had to brake hard to avoid another vehicle and the trailer decided to jackknife either to the left or right.? If you were on even a slight curve it would be even more critical.? Now add dust on the road or a light sprinkle. I can think of a couple more possible compounding factors.?I rented a trailer once to haul tear-off roof shingles.? I loaded everything as far forward as possible.? The single axle should have been farther back.? On the highway the? #@%& thing started oscillating left and right at full 90 degrees before I could safely get to the shoulder of the road.? Fortunately no one was in the adjacent lane, and the only damage was the bent rims on the trailer.?Another time I saw a trailer with a boat on it exit a road and come right across a parking lot.? Didn't even see an associated vehicle, however at the moment that wasn't my biggest concern.?Jim T. In a message dated 10/14/2025 2:25:29 PM Central Daylight Time, personal_submersibles at psubs.org writes:? Speed...highway speeds, 65-70mph, 104-112kph. Tongue weight...that's a long story.? It's a dual axle (tandom) and was originally 10% with the submarine loaded slightly forward of the front axle.? But this resulted in the equalizer (between spring sets) being offset toward the front axle, not "equal".? The result was about 6mm of clearance at the front side of the equalizer and 3-4 inches of clearance at the back side of the equalizer, causing the trailer frame to bang hard against the equalizer when going over the slightest bump.? On a long trip it wouldn't last long.? To combat this, I slid the submarine rearward until the equalizer was equally spaced from the frame on both sides which results in the submarine being positioned directly over both axles.? This solved the frame banging on the equalizer since there was now enough distance (about 2-3 inches) between both ends of the equalizer and the frame.? However, in this configuration because the submarine is directly over both axles the tongue weight is near zero (maybe 25 pounds at most).? I can literally pick up the tongue and rock the trailer up and down.? I took it this way to Michigan and the trailer still tracked very well with zero sway, but it resulted in a bumpy ride at the hitch which made for a rough ride inside the truck.? Since that trip and prior to heading south this week, I added about 250 pounds in front of the submarine but behind the hitch.? I did not measure but I'm guessing my tongue weight is now somewhere around 3-4%, still low, I know, but it was enough to result in a much smoother ride and I did not notice any lifting or bumping at the hitch.? The remaining issue is that when traveling at highway speeds and traversing a large enough pothole, or transition from road to bridge where in many cases there is a mismatch in road level (think speed bump) the energy will cause significant bouncing up and down of the trailer at the wheels.? Sometimes looks like a pogo stick in the rear view mirror. I can't change the position of the submarine or else the equalizer between springs won't be equal and I'll risk severe banging of the equalizer parts against the frame of the trailer.? I know that will cause failure of bolts and other parts eventually.? I could add more weight at the front to get more tongue weight, but even with my original configuration that gave me 10% tongue weight (I measured it) the bouncing of the trailer was still significant over a large bump.? There's just a LOT of weight (4500) lbs concentrated in a relatively small area over the axles. Jon _______________________________________________ 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 Oct 14 19:38:10 2025 From: personal_submersibles at psubs.org (Alec Smyth via Personal_Submersibles) Date: Tue, 14 Oct 2025 19:38:10 -0400 Subject: [PSUBS-MAILIST] SHOCK!! In-Reply-To: <1576697266.1632730.1760480521728@mail.yahoo.com> References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> <1820929143.2766298.1760452446581@mail.yahoo.com> <743402718.2930662.1760469908991@mail.yahoo.com> <1576697266.1632730.1760480521728@mail.yahoo.com> Message-ID: I had the exact same experience years ago, the first time I hit highway speed with the new sub on a new trailer. In seconds the trailer was 90 degrees sideways. It blew out both tires on that side, and was the closest call I've ever had. I did two things in response, and its been on rails ever since: 1) Moved the sub a couple of inches forward to increase tongue weight. 2) Installed one of these things. Its the best small investment ever. https://www.etrailer.com/Accessories-and-Parts/CURT/17200.html?feed=npn&gad_source=1&gad_campaignid=1672411894&gbraid=0AAAAAD_vMtmZbb1-gLY0fxVHu9dx9gqzA&gclid=Cj0KCQjw6bfHBhDNARIsAIGsqLhJ1AWcofS_689Y-tXWO3OPvo-coVHMfWktkrxVQb69uMwZghVDgYYaAsgDEALw_wcB Having said all that, Jon's issue is vertical bouncing and that I've never had. But I've always used torsion axles, so maybe that has something to do with it. Best, Alec On Tue, Oct 14, 2025 at 7:22?PM via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Jon, > > A huge concern could be what might happen if you had to brake hard to > avoid another vehicle and the trailer decided to jackknife either to the > left or right. If you were on even a slight curve it would be even more > critical. Now add dust on the road or a light sprinkle. I can think of a > couple more possible compounding factors. > > I rented a trailer once to haul tear-off roof shingles. I loaded > everything as far forward as possible. The single axle should have been > farther back. On the highway the #@%& thing started oscillating left and > right at full 90 degrees before I could safely get to the shoulder of the > road. Fortunately no one was in the adjacent lane, and the only damage was > the bent rims on the trailer. > > Another time I saw a trailer with a boat on it exit a road and come right > across a parking lot. Didn't even see an associated vehicle, however at > the moment that wasn't my biggest concern. > > Jim T. > > In a message dated 10/14/2025 2:25:29 PM Central Daylight Time, > personal_submersibles at psubs.org writes: > > > Speed...highway speeds, 65-70mph, 104-112kph. > > Tongue weight...that's a long story. It's a dual axle (tandom) and was > originally 10% with the submarine loaded slightly forward of the front > axle. But this resulted in the equalizer (between spring sets) being > offset toward the front axle, not "equal". The result was about 6mm of > clearance at the front side of the equalizer and 3-4 inches of clearance at > the back side of the equalizer, causing the trailer frame to bang hard > against the equalizer when going over the slightest bump. On a long trip > it wouldn't last long. To combat this, I slid the submarine rearward until > the equalizer was equally spaced from the frame on both sides which results > in the submarine being positioned directly over both axles. This solved > the frame banging on the equalizer since there was now enough distance > (about 2-3 inches) between both ends of the equalizer and the frame. > However, in this configuration because the submarine is directly over both > axles the tongue weight is near zero (maybe 25 pounds at most). I can > literally pick up the tongue and rock the trailer up and down. I took it > this way to Michigan and the trailer still tracked very well with zero > sway, but it resulted in a bumpy ride at the hitch which made for a rough > ride inside the truck. Since that trip and prior to heading south this > week, I added about 250 pounds in front of the submarine but behind the > hitch. I did not measure but I'm guessing my tongue weight is now > somewhere around 3-4%, still low, I know, but it was enough to result in a > much smoother ride and I did not notice any lifting or bumping at the > hitch. The remaining issue is that when traveling at highway speeds and > traversing a large enough pothole, or transition from road to bridge where > in many cases there is a mismatch in road level (think speed bump) the > energy will cause significant bouncing up and down of the trailer at the > wheels. Sometimes looks like a pogo stick in the rear view mirror. > > I can't change the position of the submarine or else the equalizer between > springs won't be equal and I'll risk severe banging of the equalizer parts > against the frame of the trailer. I know that will cause failure of bolts > and other parts eventually. I could add more weight at the front to get > more tongue weight, but even with my original configuration that gave me > 10% tongue weight (I measured it) the bouncing of the trailer was still > significant over a large bump. There's just a LOT of weight (4500) lbs > concentrated in a relatively small area over the axles. > > > Jon > > > > > _______________________________________________ > 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 Oct 14 20:19:27 2025 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Wed, 15 Oct 2025 00:19:27 +0000 Subject: [PSUBS-MAILIST] SHOCK!! In-Reply-To: <743402718.2930662.1760469908991@mail.yahoo.com> References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> <1820929143.2766298.1760452446581@mail.yahoo.com> <743402718.2930662.1760469908991@mail.yahoo.com> Message-ID: 3-4% is very low. Guideline is 9% to 15% for tongue load, with 12% being the sweet spot, but I would try to either move the load or add additional weight forward to get it up to 9%. Sway is a safety issue. Spring stiffness is more of a comfort / ride quality issue, which is secondary. Sean -------- Original Message -------- On Tuesday, 10/14/25 at 12:26 Jon Wallace via Personal_Submersibles wrote: Speed...highway speeds, 65-70mph, 104-112kph. Tongue weight...that's a long story.? It's a dual axle (tandom) and was originally 10% with the submarine loaded slightly forward of the front axle.? But this resulted in the equalizer (between spring sets) being offset toward the front axle, not "equal".? The result was about 6mm of clearance at the front side of the equalizer and 3-4 inches of clearance at the back side of the equalizer, causing the trailer frame to bang hard against the equalizer when going over the slightest bump.? On a long trip it wouldn't last long.? To combat this, I slid the submarine rearward until the equalizer was equally spaced from the frame on both sides which results in the submarine being positioned directly over both axles.? This solved the frame banging on the equalizer since there was now enough distance (about 2-3 inches) between both ends of the equalizer and the frame.? However, in this configuration because the submarine is directly over both axles the tongue weight is near zero (maybe 25 pounds at most).? I can literally pick up the tongue and rock the trailer up and down.? I took it this way to Michigan and the trailer still tracked very well with zero sway, but it resulted in a bumpy ride at the hitch which made for a rough ride inside the truck.? Since that trip and prior to heading south this week, I added about 250 pounds in front of the submarine but behind the hitch.? I did not measure but I'm guessing my tongue weight is now somewhere around 3-4%, still low, I know, but it was enough to result in a much smoother ride and I did not notice any lifting or bumping at the hitch.? The remaining issue is that when traveling at highway speeds and traversing a large enough pothole, or transition from road to bridge where in many cases there is a mismatch in road level (think speed bump) the energy will cause significant bouncing up and down of the trailer at the wheels.? Sometimes looks like a pogo stick in the rear view mirror. I can't change the position of the submarine or else the equalizer between springs won't be equal and I'll risk severe banging of the equalizer parts against the frame of the trailer.? I know that will cause failure of bolts and other parts eventually.? I could add more weight at the front to get more tongue weight, but even with my original configuration that gave me 10% tongue weight (I measured it) the bouncing of the trailer was still significant over a large bump.? There's just a LOT of weight (4500) lbs concentrated in a relatively small area over the axles. Jon _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles From personal_submersibles at psubs.org Tue Oct 14 23:06:25 2025 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Wed, 15 Oct 2025 03:06:25 +0000 (UTC) Subject: [PSUBS-MAILIST] SHOCK!! In-Reply-To: References: <1820929143.2766298.1760452446581.ref@mail.yahoo.com> <1820929143.2766298.1760452446581@mail.yahoo.com> <743402718.2930662.1760469908991@mail.yahoo.com> Message-ID: <1156732511.3077703.1760497585622@mail.yahoo.com> Thanks guys, I understand the issues that arise with either too little or too much tongue weight.? However, I don't believe the trailer bounce is a result of either too little, or too much, tongue weight. This was originally a boat trailer that distributed the total boat weight over bunks having a relative wide span (5 feet), and of course lengthwise forward to the winch.? Now picture a K-350 on the same trailer.? To ensure the equalizer is positioned correctly the submarine weight has to be evenly distributed between the axles, which in this case means directly over them because the "footprint" of a K-boat is only about 3x3 feet.? That means all 4500 lbs is concentrated over a narrow 3-foot span across the trailer centerline.? Additionally since the submarine is only 12 feet long, there is about 12 feet of empty space on the forward half of the trailer which explains the lack of tongue weight.?? As described earlier, moving the vessel forward is not an option for me because the shifted weight causes the equalizer for the springs to become cocked upwards and touch the frame of the trailer.? The result is essentially not having springs at all and driving this way long distance would result in mechanical failure of at least the equalizer, probably the springs, and at worst the frame itself.? The only solution I have to get tongue weight is to add weight at the front of the trailer. The bounciness caused by the trailer wheels riding over roadway imperfections seems to me to be just a natural result of all the submarine weight being concentrated over the axles and magnifying the effect of what otherwise would have been dampened by distributing the total weight over the entirety of the trailer, as in the case of a boat.? The kinetic energy created has to go somewhere and absent shock absorbers its just a matter of waiting for the friction from the bouncing to wear itself out.? Given the limitations of moving the load, I think shock absorbers are my only option to combat the bouncing.? I wouldn't be the first since I see numerous videos on YT showing installation of shocks on trailers, but it certainly is not common. Jon From personal_submersibles at psubs.org Wed Oct 22 21:58:58 2025 From: personal_submersibles at psubs.org (via Personal_Submersibles) Date: Thu, 23 Oct 2025 12:28:58 +1030 Subject: [PSUBS-MAILIST] Assistance needed, anyone please! Message-ID: After many years and many hospital holidays, ? I am no longer a financial member. However, I am hoping that someone may assist me in the spirit of Psubs. If memory serves, there was a calc formula on your site of which I no longer have access . Any way, I have a project idea that to continue with, relies on the minimum weight achievable for the following ; A 2 meter diameter sphere with appropriate bracing material and with safety margins To dive to sea-water safe depth of 150meter (160psi) No doors No windows Windows and doors will add much I know, however, are details to be considered later only if the basic weight indication makes the project viable. So basically, I need to know the framing and sheeting steel sizes and thicknesses to calculate the overall weight in this basic form. If positive at such point I will apply for re- membership to follow through with my idea. I know this sounds vague and I am asking much, but could someone assist me in this very basic task, which I know not how to do. Thanking any member who might be inclined to assist me. Cheers Les Safe diving ? -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Oct 23 00:08:46 2025 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Thu, 23 Oct 2025 04:08:46 +0000 (UTC) Subject: [PSUBS-MAILIST] Assistance needed, anyone please! In-Reply-To: References: Message-ID: <615957479.5962376.1761192526247@mail.yahoo.com> Les,there was a sphere around that size that was part of a submersible owned by Brian Cox, who passed away a few years ago.I am not sure what happened to it, but someone else listening in may be able to tell you. It was the one redeeming part of the sub,the rest was questionable.Regards Alan? Yahoo Mail: Search, organise, conquer On Thu, 23 Oct 2025 at 4:31 pm, via Personal_Submersibles wrote: ? After many years and many hospital holidays, ??I am no longer a financial member. However, I am hoping that someone may assist me in the spirit of? Psubs. If memory serves, there was a calc formula on your site of which I no longer have access . Any way, I have a project idea that to continue with, relies on the minimum weight achievable for the following ; ? A 2 meter diameter sphere with appropriate bracing material and with safety margins? To dive to sea-water safe depth of 150meter (160psi) No doors No windows? Windows and doors will add much I know, however, are details to be considered later only if the basic weight indication makes the project viable. So basically, I need to know the framing and sheeting steel sizes and thicknesses to calculate the overall weight?in this basic form. If positive at such point I will apply for re- membership to follow through with my idea. I know this sounds vague and I am asking much, but could someone assist me in this very basic task, which I know not how to do.? Thanking any member who might be inclined to assist me.? Cheers Les?? Safe diving ? ? _______________________________________________ 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 Thu Oct 23 00:24:21 2025 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Thu, 23 Oct 2025 04:24:21 +0000 (UTC) Subject: [PSUBS-MAILIST] Assistance needed, anyone please! In-Reply-To: <615957479.5962376.1761192526247@mail.yahoo.com> References: <615957479.5962376.1761192526247@mail.yahoo.com> Message-ID: <1075238498.5951389.1761193461598@mail.yahoo.com> This is it minus the ballast tanks. Yahoo Mail: Search, organise, conquer On Thu, 23 Oct 2025 at 5:10 pm, Alan James 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: -------------- next part -------------- A non-text attachment was scrubbed... Name: FB_IMG_1761192713274.jpg Type: image/jpeg Size: 48251 bytes Desc: not available URL: From personal_submersibles at psubs.org Thu Oct 23 00:47:11 2025 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Thu, 23 Oct 2025 04:47:11 +0000 (UTC) Subject: [PSUBS-MAILIST] Assistance needed, anyone please! In-Reply-To: References: Message-ID: <1046615319.5958045.1761194831645@mail.yahoo.com> You might be referring to the excel spreadsheet calculator which is available on the web site, no membership necessary.? You mentioned 150 meters or 160 psi, however 150 meters will put you at about 222 psi whereas 160 psi will put you at about 109 meters. Using imperial units and A516g70 material, the spreadsheet is showing me that 1/4 inch thickness provides 175psi and 3/8 inch thickness provides 314 psi with a safety factor of about 1/3.? However keep in mind the calculator assumes perfect material, perfect sphere shape, perfect welding, and perfection for every other element of fabrication.? It's only a guide, not definitive. Jon On Wednesday, October 22, 2025 at 11:31:26 PM EDT, via Personal_Submersibles wrote: After many years and many hospital holidays, ??I am no longer a financial member. However, I am hoping that someone may assist me in the spirit of? Psubs. If memory serves, there was a calc formula on your site of which I no longer have access . Any way, I have a project idea that to continue with, relies on the minimum weight achievable for the following ; ? A 2 meter diameter sphere with appropriate bracing material and with safety margins? To dive to sea-water safe depth of 150meter (160psi) No doors No windows? Windows and doors will add much I know, however, are details to be considered later only if the basic weight indication makes the project viable. So basically, I need to know the framing and sheeting steel sizes and thicknesses to calculate the overall weight?in this basic form. If positive at such point I will apply for re- membership to follow through with my idea. I know this sounds vague and I am asking much, but could someone assist me in this very basic task, which I know not how to do.? Thanking any member who might be inclined to assist me.? Cheers Les?? Safe diving ? ? _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles From personal_submersibles at psubs.org Thu Oct 23 08:39:03 2025 From: personal_submersibles at psubs.org (Daniel Lance via Personal_Submersibles) Date: Thu, 23 Oct 2025 08:39:03 -0400 Subject: [PSUBS-MAILIST] Assistance needed, anyone please! In-Reply-To: <1075238498.5951389.1761193461598@mail.yahoo.com> References: <615957479.5962376.1761192526247@mail.yahoo.com> <1075238498.5951389.1761193461598@mail.yahoo.com> Message-ID: This project went to the scrap yard sometime in 2022 On Thu, Oct 23, 2025, 12:24 AM Alan James via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > > This is it minus the ballast tanks. > > Yahoo Mail: Search, organise, conquer > > > On Thu, 23 Oct 2025 at 5:10 pm, Alan James 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: -------------- next part -------------- A non-text attachment was scrubbed... Name: FB_IMG_1761192713274.jpg Type: image/jpeg Size: 48251 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: FB_IMG_1761192713274.jpg Type: image/jpeg Size: 48251 bytes Desc: not available URL: From personal_submersibles at psubs.org Thu Oct 23 10:45:16 2025 From: personal_submersibles at psubs.org (Tim Novak via Personal_Submersibles) Date: Thu, 23 Oct 2025 07:45:16 -0700 Subject: [PSUBS-MAILIST] Assistance needed, anyone please! In-Reply-To: References: <615957479.5962376.1761192526247@mail.yahoo.com> <1075238498.5951389.1761193461598@mail.yahoo.com> Message-ID: It's sad to hear that Brian's project went to the scrap yard. It was an interesting take on personal submersibles, and he was an enthusiastic member and a great guy. Tim On Thu, Oct 23, 2025 at 5:39?AM Daniel Lance via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > This project went to the scrap yard sometime in 2022 > > On Thu, Oct 23, 2025, 12:24 AM Alan James via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> >> This is it minus the ballast tanks. >> >> Yahoo Mail: Search, organise, conquer >> >> >> On Thu, 23 Oct 2025 at 5:10 pm, Alan James 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: -------------- next part -------------- A non-text attachment was scrubbed... Name: FB_IMG_1761192713274.jpg Type: image/jpeg Size: 48251 bytes Desc: not available URL: From personal_submersibles at psubs.org Thu Oct 23 11:39:57 2025 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Thu, 23 Oct 2025 15:39:57 +0000 Subject: [PSUBS-MAILIST] Assistance needed, anyone please! In-Reply-To: References: Message-ID: <3fTPiuJOcqr3_rnsDPkj4jhWdms33nCEeIF560vcs4dSDsXIsTc7Y3xRKJQvXMHHDjvLuZIPhyPUuwmxshSyDkrjiYku_6o4FP9TAHVIUYs=@protonmail.com> Les, I can happily run some test cases this weekend to figure the hull material weight of your proposed sphere, but if your concern is the ultimate handling / trailering weight, as a functional submersible that is going to be exactly the weight of an equivalent sphere of seawater, at ~ 1,025 kg/m^3. For your 2m sphere, that will be 4,293.5 kg or 9,465.5 lbs. Sean On Wednesday, October 22nd, 2025 at 19:00, via Personal_Submersibles wrote: > After many years and many hospital holidays, ? I am no longer a financial member. > > However, I am hoping that someone may assist me in the spirit of Psubs. > > If memory serves, there was a calc formula on your site of which I no longer have access . > > Any way, I have a project idea that to continue with, relies on the minimum weight achievable for the following ; > > A 2 meter diameter sphere with appropriate bracing material and with safety margins > > To dive to sea-water safe depth of 150meter (160psi) No doors No windows > > Windows and doors will add much I know, however, are details to be considered later only if the basic weight indication makes the project viable. > > So basically, I need to know the framing and sheeting steel sizes and thicknesses to calculate the overall weight in this basic form. If positive at such point I will apply for re- membership to follow through with my idea. > > I know this sounds vague and I am asking much, but could someone assist me in this very basic task, which I know not how to do. > > Thanking any member who might be inclined to assist me. > > Cheers Les > > Safe diving ? -------------- next part -------------- An HTML attachment was scrubbed... URL: