[Spaceships] Winged Spaceships

[Anthony]

Originally Posted by scc

The thread of discussion had moved onto rocket engines with air intakes

The performance of such engines is at best incidentally related to the performance of rocket engines from fuel tanks, as liquid oxygen has somewhere on the order of 5,000 times the oxidizer density of air. Realistically, you probably need a completely different engine, and in any case you should model it as a ramjet or scramjet, not a rocket.