High - Conductivity Cooling Fins for Aircraft Engines

INCREASES the take-off horsepower of aircooled aircraft engines had made it imperative that methods of getting more efficient cooling be devised.

In 1939 a program was initiated, therefore, to develop ways of applying high-conductivity (that is, copper and aluminum) fins to cylinder barrels to take the place of the integral steel fins on the cylinder barrels of earlier aircooled engines.

Presented here are descriptions of the various methods of attaching these fins that were investigated, together with the advantages of each method.