Re: spinning base engine
We had to inflate the Roton's size and power for larger payloads, and convert the original blade-end thruster concept to the huge spinning base engine.
Interesting. Do you have a link to pics of the spinning base engine concept?
It has to be a huge rush to get up in the morning and think; "Oh yeah, I get to work on spaceships today."
Was the main propulsion a plug type aerospike engine?