Bipogram t1_jd1np17 wrote
Reply to comment by BrentRedinger in Would it work to get 1G in a spacecraft going to Mars using acceleration? by OysteinM
Daedalus was still an Orion-esque engine, but with thermonuclear (not fission) 'devices'.
Bussard ramjets are out of favour as nobody is sure that they make nett thrust.
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