[PSUBS-MAILIST] penetration schedule

Fri Aug 14 08:40:40 EDT 2015

Brian,I agree, the less junk inside the better, your fine if you have enough lead weights, so that you can take out the right amount.  Gamma works best 15 lb heavy.  That is where I like it anyways, the bubble is small enough to keep up with it.   I think we are talking about the same thing, I call it a nipple and you call it a coupler.  It looks like a short pipe with threads either inside or outside.Hank

     On Thursday, August 13, 2015 9:59 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hank,             Can I put a bronze bushing in a ss coupling, if that is necessary for the O2?   Does the O2 need to not go through stainless?    I had a bad experience connecting stainless nipples into a stainless 90,  it galled so bad that I ruined the nipple getting it out of there. Maybe I just need to use more Teflon tape. brian   

--- personal_submersibles at psubs.org wrote:

From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] penetration schedule
Date: Thu, 13 Aug 2015 20:46:45 -0700

Hank,             It seems to me that it's easier to weld in couplings rather than nipples, I suppose it's just preference.   I sort of have a trim tank already with my forward hard ballast tank, I'm just not sure at this point whether or not that will be enough control.  A way to deal with varying loads is probably something I need to address, but I don't want to give up valuable cabin space for it.    Brian

--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] penetration schedule
Date: Thu, 13 Aug 2015 18:23:16 +0000 (UTC)

Brian,I would add a few nipples and cap them off, you will want them down the road.A trim tank may be a good idea for such a heavy sub, unless you have real powerful vertical thrusters.  I find when I take a passenger, even my daughter Roman who is light as a feather, I am always quite over weight.  That is no problem at all in a Gamma size sub because the vertical thrusters have enough jam to stop the sub hitting bottom.  A trim tank would be good to keep you closer to ideal weight, or have lots of small weights to take out.  I foolishly made two rather heavy lead weights.   Are you running your O2 through a ss nipple, is that okay, I am planning to do that for external O2.  I remember talk about the K subs needing a Bronze fitting or something like that.Hank 

     On Thursday, August 13, 2015 11:52 AM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hank,            Here are all my penetrations: Front hard ballast tank 1.   flood valve -  1/2" ss rod thru hull  2.   vent valve 3.  air inject    -  ss coupling Main ballast tank (soft) 1. flood valve  - ss 1/2" rod thru hull 2. air inject mechanical penetrations:  1.  front flaps       - ss 1/2" rod thru hull  (all)  2. back flaps  3. motor turning   ( steering ) Breathing Oxygen  -  3/4" coupling  or smaller  ( will bush) Flood Valve  - 1 1/2"  - ss coupling  ( near bottom) main ballast HP air in   -   #1 - 3/4"  ss coupling  #2 - 3/4"     ( will have bushings to 1/2" or smaller)  Gauges  1.  Temperature  - 1/2"   ss coupling   2.  Pressure -    1/2" Release buoy   1.  1/2" SS rod thru hull Equalizing valve    1.  3/4" coupling Drop weight   1.  7/8" ss rod thu hull Hatch dog thu hull 1.  7/8" ss rod  Is there anything that I obviously forgot ??      All my electrical will be going through a separate viewport fitting. So far I have the front trim, hatch , but no air yet. Not sure if I want to have a small trim tank in the main cabin or not.  Brian      
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