Engine Controls Throttle - Changes Boost Pressure Mixture Control - Semi-automatic with two regimes Rich and Lean Propeller Control - Sets Engine RPM (Constant Speed Unit) Radiator Flap Control - Regulates radiator cooling - open causes greater cooling (good) and greater drag (bad), but airspeed plays a major part in cooling effectiveness.
Exhaust Flame Issue
I noticed a bug with the exhaust flame on both these planes. You can move the mixture control to adjust the color of the flame as if it was a manual mixture control. Either they have manual mixture implemented, which I dont believe is the case or the flame color effect is incorrect and behaving as if the mixture was a manual system.