[PSUBS-MAILIST] window test chamber

[Joe Perkel]

That's right, I forgot! 

Thanks Hank!

Joe

Sent from my overpriced 
iPhone

On Nov 1, 2013, at 8:20 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:

> Joe,
> In my case my windows were abs certified in 1993.  That means they can only be used to a percentage of the original rating. Also the way the windows were stored is critical, especially if they were in a tropical climate.  Since I can not verify the storage method and location,  I want to test them to at least the depth I will be testing the hull.
> Hank
> 
> 
> On Friday, November 1, 2013 5:37:31 PM, Joe Perkel <josephperkel at yahoo.com> wrote:
> Hank,
>  
> I think that's pretty neat. It does bring a question though.
>  
> If the acrylic has known properties at "X" thickness, is there still a need to test? Is it the material itself that needs testing, the  seal, or frame?, I'm not clear here.
>  
> Joe
> From: hank pronk <hanker_20032000 at yahoo.ca>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Friday, November 1, 2013 5:01 PM
> Subject: Re: [PSUBS-MAILIST] window test chamber
> 
> Rick,
> I posted a picture of my window test chamber under Gamma restoration.  The chamber is built entirely from scrap in my shop.  I tested the first window to 500psi.  Yes I was nervous :_)   The top ring is a 1in thick window frame I had from a previous project.  The side of the chamber is 1/4 flat bar bent around and the base is 3/4in plate.  I machined an o-ring groove in the base that bolts to a 5/8 disk left over from building my hatch.   I also had to machine the inside of the window frame again after welding it together.  The window sits on a gasket and is bolted as if it were on the sub.
> Hank
> From: Land N Sea <landnsea1 at hawaiiantel.net>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Wednesday, October 30, 2013 9:19:06 PM
> Subject: Re: [PSUBS-MAILIST] window test chamber
> I was considering doing the same thing, fabricating a test pot to take one to failure just out of curiosity and piece of mind as well as test the rest to 600’ before installing them but figured it might me costly to do, so kind of gave up the idea. Let us know your design with any pictures you may have of it and an idea or your cost outlay if you don’t mind and would still like to do it if feasible. I cringe at the idea of a port light failure on the sub when testing and have to reel in a real heavy object full of sea water from 600’!! Good luck and let us know how it went.
>  
> Rick
>  
> From: hank pronk
> Sent: Wednesday, October 30, 2013 2:49 PM
> To: Personal Submersibles General Discussion
> Subject: Re: [PSUBS-MAILIST] window test chamber
>  
> Rick,
> Thanks', your right, it will be much safer.  I am only testing to 1,000 feet, I don't think my chamber will handle a destruction test.
> Hank 
>  
> From: Land N Sea <landnsea1 at hawaiiantel.net>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Wednesday, October 30, 2013 6:37:15 PM
> Subject: Re: [PSUBS-MAILIST] window test chamber
> Back in my diving days our company retested a couple of deck chambers and they filled them completely with water leaving no air at all so if it ruptured, there would be little or no bang. If you are testing it to failure then I guess you would still need some air on the LP side so you are back to an air gap. Get a long hose with the valve on your end and stand outside the building and peek around the corner.
>  
> Rick
>  
> From: hank pronk
> Sent: Wednesday, October 30, 2013 1:45 PM
> To: Personal Submersibles General Discussion
> Subject: Re: [PSUBS-MAILIST] window test chamber
>  
> Today I built a window pressure test chamber.  When the window is in the chamber there is a small air space remaining.  Should that space be filled with water while the window is under pressure. The space is about 250ml.
> Hank
>  
> From: hank pronk <hanker_20032000 at yahoo.ca>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Wednesday, October 30, 2013 10:53:07 AM
> Subject: Re: [PSUBS-MAILIST] Hatch mechanisms
> Since the force on the puller hub is directed outward in this application, the loss of material for an oversize size rod should not matter. 
> Hank
>  
> From: Alec Smyth <alecsmyth at gmail.com>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Wednesday, October 30, 2013 9:31:43 AM
> Subject: Re: [PSUBS-MAILIST] Hatch mechanisms
> Can one drill out the puller thread and cut a new slightly larger one in coarse thread?
> On Wed, Oct 30, 2013 at 10:37 AM, hank pronk <hanker_20032000 at yahoo.ca> wrote:
> James,
> It's like the puller was made for it.  Be aware though, with the fine thread it is slow to unlatch.  A real coarse thread, would be faster. 
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