The Pratt & Whitney TF30 was turbofan jet engine which was developed by Pratt & Whitney to power the F6D Missileer, the F-111 Aardvaak, the F-14A Tomcat, and the A-7 Corsair II. The first performance of the TF30 took place in 1964 and it was manufactured until 1986.
Before the introduction of the TF30, all supersonic jet aircraft 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.
Specifications of the Pratt & Whitney TF30
Length: 6.14 m
Diameter: 1.245 m
Dry weight: 1825 kg
Compressor: axial with 6 low pressure and 7 high pressure stages
Turbine: 3 stage low pressure turbine, 1 stage high pressure turbine
Bypass ratio: 0.878:1