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Exactly! Nuclear thermal rockets/fission-fragment rockets are the way to go, but you can't launch them directly from Earth because of the nuclear fallout.
by raducu 11y ago
Exactly!
Nuclear thermal rockets/fission-fragment rockets are the way to go, but you can't launch them directly from Earth because of the nuclear fallout.
- Gravityloss 11y agoWell, you can't use them for launch. And there's lots of other options for in-space propulsion. The specific impulse is "only" double that of chemical ones, and there's potentially a large dry mass penalty.
- raducu 11y agoYou mean the specific impulse for nuclear thermal rockets, as far as I know the fission fragment rockets have ISPs in the 10^5 range.