[rotorwrench]

Airplanes can't stop at a stop sign so they always have air flow. Many have cowl flaps to control air flow as needed. Aircraft engines have always been under the weight controlled design for better power to weight ratio. As technology progressed, they finally found ways to use liquid cooling to a science with examples being Rolls Royce Merlin engines and Allison 1710 V12 engines. The Merlin had more power due to a built in supercharger system and the allison was stuck with turbocharging so it never gained the power levels that the RR/Packard Merlins did.

The smaller helicopters with piston engines still use a basic air cooled aircraft engine but they are modified for different fan designs with baffles to help cool things down. A lot of them have two oil coolers just to keep within limits under heavy loads. Cylinder head temperature and oil temperature gauges are required items on all of the air cooled aircraft engines.

Ferdinand Porsche was the head of the design team that developed the "peoples car" for the German Labor Front (Union) back in 1937 before Hitler went ape shit. VW, Auto Union (Audi), and Porsche have been intertwined with each other in one way or another since the war was over.