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From: video@ccwf.cc.utexas.edu (Henry J. Cobb)
Newsgroups: sci.military
Subject: Re: Stealth boats(?)
Message-ID: <1991Mar18.001858.20636@cbnews.att.com>
Date: 18 Mar 91 00:18:58 GMT
References: <1991Mar12.233406.1012@cbnews.att.com> <1991Mar14.033937.24699@cbnews.att.com>
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From: video@ccwf.cc.utexas.edu (Henry J. Cobb)


mcguire@cs (Tim McGuire) writes:
>
>The recent PBS program (I believe it was on NOVA) on stealth technology
>showed new ship designs for limiting the the radar signature of large
>ships.  I recall that a major problem is trying to "stealthify" the
>ship's infrared emissions.  Do y'all have access to NOVA in Norway? 
>
>Tim McGuire
>mcguire@cs.tamu.edu

	Water jet propulsion offers a large 'heat dump' to mask the ship's
direct IR signature.  Sea water is used in a heat-exchanger to mask the 
exhaust from the gas turbine, and run the body panel cooling system.

	Stealth aircraft have to rely on the much lower heat capacity of
air.
-- 
	Henry J. Cobb	video@ccwf.cc.utexas.edu  SFB Tyrant
"The problem with the future is that it keeps turning into the present" -Hobbes