Pratt & Whitney TF30

Pratt & Whitney TF30

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Pratt & Whitney TF30

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The Pratt & Whitney TF30 (company designation JTF10A) was a military low-bypass turbofan engine originally designed by Pratt & Whitney for the subsonic F6D Missileer missile carrier, but this project was cancelled. It was later adapted with an afterburner for supersonic designs, and in this form it was the world's first afterburning turbofan, going on to power the F-111 and the F-14A Tomcat, as well as in early versions of the A-7 Corsair II without an afterburner. First flight of the TF30 was in 1964 and production continued until 1986.

Design and development

Supersonic jets before the introduction of the TF30 all used afterburning turbojet engines as opposed to turbofan engines. A turbojet engine's entire volume of intake air is directed through the engine core, whereas in a turbofan design, a significant percentage of the intake air is routed around the core. Turbofan engines deliver much improved fuel burn efficiencies over turbojets. An afterburning turbofan combines the fuel economy of a turbofan with the greatly increased thrust produced by an afterburner.

F-111

The F-111A/E used the TF30-P-103 (aka P-3) turbofan.. Federation of American Scientists. The F-111 had problems with inlet compatibility, and many faulted the placement of the intakes behind the disturbed...
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