Re: [PSUBS-MAILIST] Isn't 'Mini book review.' anymore--pressure test

[CARRO@wans.net]

If you enter the tank from the top, you would only have to fill it once. Add 
your sub, top off th tank, close 
the door and use a (oil) hydraulic ram to apply pressure to the tank.
--- Original Message ---
From: DBACKIDS@aol.com
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Isn't 'Mini book review.' anymore--pressure 
test

>Even though testing with water would be more efficient, testing with air 
>would be cheaper, would it not? All you need is a chamber big enough for 
your 
>hull, and a compressor pump. Air is cheap; in fact, it's so cheap, it's 
free! 
>If you're in Arizona or anywhere you can't just pump straight from a lake 
or 
>ocean, you'd have to pay one heck of a water bill by the time you test it!
>I think I can safely asume the chambers would be the same (therefore, same 
>cost), except, you would not have to have the air chamber supported as much 

>(a couple hundred gallons of water gets kinda heavy, not as much so as I 
>think the equivalent psi of air would be). The pump would most likely be 
>cheaper for air, all you need is a high power compressor, whilst you would 
>need a mondo (I like that word) high pressure water pump.
>
>That's my two cents worth, take as you may.
>
>David (from CA, not MN)