Quote:
Originally Posted by Ulzgoroth
Here's the big problem, though - volume is not a factor in GURPS Spaceships. A tank of hydrogen, water, rock dust, or nuclear pulse units all behave the same in all respects except what rocket uses them.
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Well, a rocket works by tossing out reaction mass, so that's true, but we're not talking about rocket engines per se. At least, I don't think we are.
For an anti-matter powerplant, the author is more or less correct in postulating that lithium/antilithium would be a more energetic fuel given the greater number of particles composing it relative to hydrogen/antihydrogen and that's what I was unpacking for OP.
How one would go about representing that more energetic fuel in terms of Spaceships is a different problem.