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Retired AF Guy said:I know back in the 50-60s the US was looking into nuclear propulsion for space travel but wasn't it banned by some international treaty.
...and 70s. Tested out in ‘Jackass Flats, NV.’ :nod:
Nuclear propulsion using hydrogen as the working propellant wins the ‘Specific Impulse’ contest...almost 900 seconds. Even LH2 and LOX only yields up to 450 seconds. Inter-solar travel would definitely benefit from nuclear propulsion.