Not the First GTF

Credit: PRATT & WHITNEY
The Pratt & Whitney geared turbofan (GTF) looks like a great engine, but it is far from being an innovation. The first GTF engines ran during World War II in Germany (Heinkel S-10 and Daimler-Benz DB007), but never flew. The first GTF to fly, Turbomeca Aspin, did so on Jan. 2, 1952. The first to...

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