Quote:
Originally Posted by Bicycle Bob
Sorry I'm rushed these days, but the last big piston aircraft engine, the fabulous Napier Deltic, used the pistons as a gas generator, and took the propeller power off from the exhaust turbine. It got great mileage, but cost too much as jet turbine alloys improved.
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I'm aware the Napier Deltic borrowed some design features from Junkers aircraft engines, but I'm unaware of any aeronautical application for the Napier Deltic. OTOH they were great powerplants for trains and some military vessels.