Exhaust recycling and O2 sensor for submarine use

[McMeikan, Andrew]

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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