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An Overview of Military Jet Engine History 115 the F/A-18E/F, powered by the GE F414, a derivative of the F404. The Air Force continued to develop the Advanced Tactical Fighter (ATF) program, which resulted in the F-22 Raptor fighter. The key new per- formance requirements imposed on the engine developers were su- percruise (sustained supersonic capability without afterburner), stealth or LO characteristics, thrust vectoring, short take-off and landing capabilities, high reliability, and low unit cost. Once again, the primary competitors for the engine business were P&W and GE. Ironically, it can be argued that P&W and GE switched strategies compared with the strategies used previously in the F100 versus F101/110 “Great Engine War” competition. In view of the painful developmental problems that had plagued both the TF30 and F100 programs and the resulting loss of business due to the Air Force’s encouragement of GE’s reentering the competition, P&W management seemed to have shifted to a strategy of emphasizing somewhat-lower-risk technology and high reliability to win the new engine competition. Yet GE had lost the previous initial FX/VFX competition to P&W in part because of the perceived technological virtuosity of the P&W design. GE was then forced to struggle for more than ten years to reenter the high-end fighter engine market, which it finally did by stressing the reliability and simplicity of its F110 and F404 engines as compared with P&W’s problem-prone engines. This time, GE management was determined to win the initial competition and seemed to have concluded that it could be done by adopting P&W’s earlier strategy of demonstrating very high performance and unparalleled technological sophistication. Similar to the earlier Advanced Technology Engine effort that pre- ceded the F100 engine program, a series of government-sponsored component demonstration and concept development programs pre- ceded the development of prototype competitor engines for the ATF. These included such efforts as the Advanced Technology Engine Studies (ATES) program led by the Navy and the Aircraft Propulsion Subsystem Integration program that included development of the Joint Technology Demonstration Engine (JTDE). In June 1981, the Air Force issued a formal Request for Information to industry for the ATF engine. P&W proposed its ATES design, which drew heavily on its work conducted under the ATEGG and JTDE pro- grams. This was a very-low-bypass turbofan (or leaky turbojet) withPDF Image | Military Jet Engine Acquisition Technology Basics and Cost-Estimating Methodology
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