Radiator/cowling flaps

And overheating, or the lack thereof, defies logic on some planes. The Fw190D9 in German testing at military power in climb failed to show any difference in temp regardless of cowl flap position while not approaching overheat. It was also noted the least drag position for the cowl flaps was 23% open (not 0% as in game).

I will only mention the Mustang to say that I won't bring it up - lol.