nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpq7wkkj73azdfr23hmgd07fn0h39xvy0w72garahk5p8hg8jv8dx5s9v3tsk me and a friend a while back did some rough calculations. With reasonable state of the art liquid propellants (RP-1 and LOX or so) and engine Isp values and a two stage design, if you ju...