3 ms·
Well, 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, an
by Gravityloss 11y ago
Well, 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.