In 1962, NASA engineers spent more time bickering over engine types than...

https://wiki-cable.win/index.php/The_Hybrid_Illusion:_Can_We_Actually_Mix_Chemical_and_Electric_Propulsion%3F

In 1962, NASA engineers spent more time bickering over engine types than building rockets. The choice between nuclear, chemical, and electric propulsion wasn't just physics—it was a battle for the agency's soul