Quote:
Originally Posted by sidecar
The general aviation aircraft fleet operated today are largely designed little different to the technology available pre-war in the late 30's.
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It's changing, but at a very slow pace. It actually does surprise me that liquid-cooling engines didn't become popular for general aviation, since they can provide heating for the cab without having to use any fuel-powered supplementary heater, and can be better enclosed to protect the block from thermal shock damage at a fast descending. The only general aircraft with a liquid-cooled engine that I remember right now is the Piper Archer DX.