Subject:
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Re: Rocket science, & some MOC ideas (Was: Combat strategies and tactics in space)
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Newsgroups:
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lugnet.space
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Date:
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Mon, 25 Oct 2004 15:38:57 GMT
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Viewed:
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1957 times
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Take the highest Isp (specific impulse) engines we’ve got (“Isp” is
essentially a measure of exhaust velocity - the higher the better, as far as
fuel efficiency goes) around 530 seconds (H2/O2 SSME’s on the space shuttle
orbiter are at 460, while the theoretical max for H2/O2 is 528), allowing
*any* ship to have a total delta-v (total velocity change it can manage) in
the 10 kps (kilometer per second) range implies that fuel outmasses ship by
almost 7 to 1! Since both H2 & O2 are significantly less dense than the ship
structure, they take up even more interesting LEGO space than that outrageous
mass fraction implies, probably at least 2-3 times that in voume.
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Kind of makes me wonder how many clear bricks you would need to make the
invisible fuel tanks of an X-Wing which was shown lifting off a planet at least
twice on a single tank of fuel.
Seriously though thanks for the info.
-Mike Petrucelli
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