[PSUBS-MAILIST] Pressure Test

Tue Jul 4 05:59:23 EDT 2017

Sean,Okay,  I am getting it now.  I am thinking in terms of supporting the window really instead of supporting the hull.   I figured if the outside pressure is pushing against the port the same as the hull and the port compresses, then the port essentially is as strong as the hull, because the port is under compression.  Thank's for clearing that up.Hank 

    On Monday, July 3, 2017 8:49 PM, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hi Greg,
Can you send me an email off list please? I can see you're on this thread but it doesn't show me the actual email address, and the address I have for you bounces.

Thanks,
Alec
On Mon, Jun 26, 2017 at 5:19 PM, james cottrell via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Hank,
I'm surprised to hear you say that the CNG sphere is too light. My "seat of the pants" engineering tells me that a CNG sphere would be plenty. Are you sure its too light? If memory serves me correctly, the sphere that Ron Allum made was 42" OD x 2.5" thick gun barrel steel and had a 1.4/1 safety factor at 38,000 ft.
What thickness acrylic do you need for the port? I'll donate a piece of 4" to the cause if that will help.
Greg

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs. org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs. org> 
 Sent: Monday, June 26, 2017 4:10 PM
 Subject: Re: [PSUBS-MAILIST] Pressure Test

Greg, I do not have a plan for getting on site.  I have a plan to get there, East Coast that is.  I can haul it cross country myself.Right now it is a dream really, not a plan.  But Elementary 3000 started that way.  I do have it mostly figured out, and I have an EFA guy lined up through Karl Stanley.   I will have two heads pressed and machined at Edmonton Exchanger in Edmonton Alberta.  My original CNG sphere plan is to light.  I think the getting on site part will evolve, I am sure money will make that happen easily.Thanks' for calling it "interesting" and not ridiculous. ;-)Hank 

    On Monday, June 26, 2017 12:01 PM, Alan via Personal_Submersibles <personal_submersibles at psubs. org> wrote:

 Thanks David,I get 7000 lumens. Have a dimmer control for it buthaven't tried it yet.Alan

Sent from my iPad
On 27/06/2017, at 3:08 AM, David Colombo via Personal_Submersibles <personal_submersibles at psubs. org> wrote:

Hi Alan, Looks great!, what Lumens did you get with this design?

Best Regards,
David Colombo

804 College Ave
Santa Rosa, CA. 95404
(707) 536-1424
www.SeaQuestor.com

On Mon, Jun 26, 2017 at 4:48 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs. org> wrote:

Alan,That really turned out nice, how did you mould the polyurethane? that stuff sticks like mad. I would leave the white gasket, it looks fine.  Either the gasket thickness is not even or the seat is not perfectly matched to the Lenz. 

    On Sunday, June 25, 2017 10:30 PM, Alan via Personal_Submersibles <personal_submersibles at psubs. org> wrote:

 Pressure tested my light to 1000 psi for an hour using the water blaster 
& no leaks! I didn't have a pressure relief valve in the system as I do with
my air pressure set up & it was a pain getting the chamber lid off. I had
thought the water blaster would have leaked a bit of pressure but it didn't.
The sealing system for the wires was a 3 layered process; encapsulating the
wires in the epoxy, then coating the insulation for an inch up from where they came 
out of  the epoxy, & over the epoxy with a 2 part heat activated pvc glue that 
they use on inflatable boats. This glue worked a lot better on the pvc insulation
than several others I tried like E61000 (supposed to be better than shoe goo),
3M 5200 & polyurethane.
Over this, to tidy it up & act as a cable support, I moulded polyurethane.
In the attached photos the white ptfe gasket that the lens sits on looks wet
but it is just the compression of the lens against the gasket. I don't like this
from a cosmetic point & may change it. The 2 objects with the light are the
male mould for the polyurethane cable support & the silicone mould for the 
same.
Alan

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