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Results tagged with rockets
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user 36625
Questions regarding the boosters or thrusters used to propel man-made objects. For rockets firing opposite the primaries, see [retrorockets]. See wiki for other related tags.
2
votes
Why is hydrogen better than helium as remass?
Okay, so my previous approach didn't work out. So let's try another.
Hydrogen need not have any more ISP than reinforced concrete. Indeed, there's little difference between the two if you are simply t …
5
votes
0
answers
196
views
Low-pressure pump-fed rocket engine?
I saw the above suggested in LEO on the Cheap. In P.130 it says:
A compromise between high-performance/lightweight pump-fed vehicle designs
and cost-optimized pressure-fed vehicles with heavier struc …
0
votes
Why do pump and pressure fed liquid engines need to operate at high pressures?
The simple answer is probably:
The need for high thermal efficiency in an atmosphere, which requires high pressure ratio
A low pressure engine would need to be physically large to produce the same th …