Presumably this is a solid core design and since these would never fly in the atmosphere anyway, I've always thought that going all in on nuclear salt water eng

Presumably this is a solid core design and since these would never fly in the atmosphere anyway, I've always thought that going all in on nuclear salt water engines would be the way to go [1]. These things are so high performance, I bet even a small/micro one could enable tic tac levels of performance, buts that just a guess. [1] https://en.wikipedia.org/wiki/Nuclear_salt-water_rocket https://en.wikipedia.org/wiki/Nuclear_salt-water_rocket