On the topic of Crimson Skies aircraft in real life. The first one is the Blohm Voss which was designed as a fast bomber and probably served as inspiration for the game’s Warhawk. Second we have the Henschel a canard fighter and basis for the Bloodhawk.
Heinkel He 113 "Super Fighter" which saw action in the Battle of Britain. The German propaganda claimed it flew in the B of B, but they never built more than the one prototype shown in commercial registration markings.