Enoki
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Here's a proposal by North American Aircraft in the late 40's to build a nuclear engine version of the V-2. If you combine this with a larger rocket, it would be possible for a world to have an interplanetary vessel carrying several crew at TL's as low as possibly 5 or 6. It also presents an alternative to nuclear rockets using atomic bombs as the propulsion.
projectrho.com
Something to consider for those that like steampunk and the sort of Jules Verne sci fi scenarios...
Realistic Designs A-G - Atomic Rockets
Something to consider for those that like steampunk and the sort of Jules Verne sci fi scenarios...