[Date Prev][Date Next]
[Chronological]
[Thread]
[Top]
Re: [PSUBS-MAILIST] Actual water pressure
Hi Troy,
> Date: Mon, 18 Mar 2002 12:36:28 -0600
> From: Troy Hambly <embalmer@ameritech.net>
> User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.4) Gecko/20011019
Netscape6/6.2
> X-Accept-Language: en-us
> To: personal_submersibles@psubs.org
> Subject: [PSUBS-MAILIST] Actual water pressure
> Content-Transfer-Encoding: 7bit
> Anyway, I'd like another stab at this project, but this time I'm going
> to do it right and build a 1 atm design. My questions are, what are the
> actual pressures that will be subjected on a sub at 250 feet, 500 feet,
> 1000 feet. I know these will be somewhat approximate, but these numbers
> will give me an idea of some design goals in the strength and maximum
> depth. I'm looking more towards the area of a 2 person short duration
> sub and I really don't need super depth capability, but if I can go
> lower without significantly increasing the costs of
> building...everything is open to negotiation at this time.
>
> Troy Hambly
>
In salt water starting at sea level:
Pressure ( in atm ) = (1atm/33ft) * depth (in feet) + 1 atm
1 atm = 14.7psi (pound per square inch)
Depth Atm Psi
250 8.58 126,06
500 16.15 237.43
1000 31.30 460.15
For safety design a hull with a crush depth of twice you are planning
as your max manned depth. Then test the hull unmanned at 1.5 your
max manned depth.
Regards,
Ray