New answers tagged nuclear-propulsion
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I've heard that nuclear thermal propulsion will get 800-900 ISP. Is this the same as it got on ground tests or is it a prediction of vacuum isp?
The NERVA NRX A6 engine developed by NASA and the AEC had a specific impulse of 869sec https://en.wikipedia.org/wiki/NERVA at Jackass Flats altitude 2800ft.
Vacuum ISP can be 5%-10% higher than sea ...
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