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Old 09-30-2017, 12:16 PM   #6
Michael Thayne
 
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Join Date: May 2010
Default Re: [Spaceships] IR Signatures for the power plants and drives in Spaceships 7

I'm only learning about this because of GURPS, but as I understand it jet engines can be rated for ISP, which can't be inferred from GURPS stats because they don't carry reaction mass, but nevertheless because ramjets have relatively low ISP, a fission or fusion ramjet probably shouldn't have a higher IR signature than the jet engine in the original Spaceships volume, because that's described as representing a "a turbo ramjet or scramjet".

Am I looking at this right?
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