We imagine the space race as a smooth path to the moon, but 1962 memos reveal a...

https://yenkee-wiki.win/index.php/Hybrid_Propulsion:_Why_Combining_Rockets_and_Ion_Thrusters_Isn%E2%80%99t_Just_a_%22Concept%22%E2%80%94It%E2%80%99s_a_Math_Problem

We imagine the space race as a smooth path to the moon, but 1962 memos reveal a much messier reality. Engineers were stuck in a stalemate, debating whether to bet on nuclear, chemical, or electric engines