Exhaust recycling and O2 sensor for submarine use

[Pat Ford]

 you are aware that a pressure vessel rated at +250 PSI will do less then 
50 feet before it crushes? When the pressure is on the inside the shell is loaded in tension( steel is very strong in tension), when the pressure is outside the strain is not in tension, and the failure mode becomes buckling. Get the "pressure vessel handbook" (ASME publication) and read about pressure vessels under external pressure.

 BTW I am looking at the same thing but found a 3000Psi shell to start with ( ~96" long and 48"dia)

 DO NOT try to recycle engine exhaust!! Carbon monoxide is a killer, have a snorkel and use the engine to compress air, and charge batteries ( avoid lead acid hydrogen gas its not nice either)

 Have you looked at using masks with overboard discharge? Thats the route I'm heading towards

Previously, you (DIY_EFI Digest) wrote:

{ Date: Thu, 3 Aug 2000 16:55:33 +0800 
{ From: "McMeikan, Andrew" <andrew.mcmeikan at mitswa.com.au>
{ Subject: Exhaust recycling and O2 sensor for submarine use
{ 
{ Hi folks,
{ 	I am trying to build a submarine and although I wish to use DC
{ motors for propulsion I am also looking at a small 4 stroke engine.  Does
{ anyone have pointers to info on exhaust recycling or on minimizing air use.
{ 
{ I am also interested in any air quality monitoring ideas that you might
{ have.  Sub volume is small at about 10 cubic meters, would an automotive O2
{ sensor have a fast response time?
{ 
{ 	cya,	Andrew...
{ 
{ Pics of pressure vessel at http://members.xoom.com/andrewmuck/sub/goSub.htm
{ 

{ 
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--
Pat Ford                           email: pford at qnx.com
QNX Software Systems, Ltd.           WWW: http://www.qnx.com
(613) 591-0931      (voice)         mail: 175 Terence Matthews          
(613) 591-3579      (fax)                 Kanata, Ontario, Canada K2M 1W8

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