[PSUBS-MAILIST] p trap

[Alec Smyth via Personal_Submersibles]

Hi Jim,

I could, but with the use of a set screw I no longer have a need for the
elbow.


:)

Alec

On Sun, Jun 14, 2015 at 7:16 PM, via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

>  Alec,
> Could you tap a small block and weld/adhere it to the top of the can for
> the entry point for your elbow?  That would eliminate any protrusion into
> the top of the can.  You could substitute a T with a bleed for the elbow
> and even add another fill point at either the top or the bottom.
> Jim
>
>  In a message dated 6/14/2015 5:02:35 P.M. Central Daylight Time,
> personal_submersibles at psubs.org writes:
>
> Alec,
> Your plan is good also because the oil can expand from hot weather with
> the bellows.  I hope to be back in the water in a week or so.  Life and
> work is holding me up.
> I have my new trailer ready, I built a hydraulic actuated idler wheel.
> The system raises the trailer off the ball as well as allows the trailer to
> roll into the water.  I use a tow strap rather than an extendable bar
> because the ramps here are long and steep enough.
>
> Hank
> --------------------------------------------
> On Sun, 6/14/15, Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Subject: Re: [PSUBS-MAILIST] p trap
> To: "Personal Submersibles General Discussion" <
> personal_submersibles at psubs.org>
> Received: Sunday, June 14, 2015, 5:52 PM
>
> Thanks
> Hank. Looking forward to hearing how it goes. For my part I
> have trouble with the oil trap method because of the fact
> the thrusters rotate. But I'm going to try the
> following. The old method is a hose wound around the cans
> between an elbow at the top and one at the bottom. To fill,
> I disconnect the tube from the top elbow and add oil through
> the tube until it flows out the top. The problem is a little
> of the elbow protrudes inside the can, even though I trimmed
> it, so its hard to get every last bubble out. The plan is to
> replace the tube with a plastic bellows bottle attached to
> the bottom elbow, and put in a set screw in the hole where
> the top elbow is. This would do two thing; significantly
> increase the compensation volume and sensitivity of the
> bladder, and eliminate the protrusion caused of the elbow
> inside the can. I'm pretty confident this will solve the
> issue, but the only problem is I don't have any dive
> plans in the near future to find out.
> Let us know how the trap approach
> goes!
> Best,
> Alec
> On Sun, Jun 14, 2015 at
> 5:23 PM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org>
> wrote:
> Alec,
>
> I just made a discovery, I opened up the tail end of Gamma
> to install my experimental p trap tube.  I put a 1/8 ss
> tube down 24 inches inside my rear ballast tank.  The
> discovery was that there was pressure built up in the drive
> shaft tube.  I did not dive deep enough to create this
> pressure, that means it is from sitting in the hot sun
> (30C)
>
> and expanding the oil.  Maybe our problem is expanding oil
> from hot weather then cooling at depth and sucking in water.
> Well maybe this p trap idea is the solution.
>
> Hank
>
>
>
>
>
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