Military Jet Engine Acquisition Technology Basics and Cost-Estimating Methodology

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Military Jet Engine Acquisition Technology Basics and Cost-Estimating Methodology ( military-jet-engine-acquisition-technology-basics-and-cost-e )

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Modern Tactical Jet Engines 141 nozzle’s life and will reduce its infrared signature. This advanced nozzle can be used on most F110 engines, just not the F110-GE-132 (Jane’s Information Group, 1999b). F404-GE-F1D2 This GE engine is a nonafterburning, low-bypass-ratio, mixed-flow turbofan used in the subsonic F-117 stealth aircraft. It is derived from the family of afterburning and nonafterburning F404s, which the U.S. Navy and other services operate in F-18A/B/C/D and other aircraft. Under takeoff conditions, the F404-GE-F1D2 produces 10,000 pounds of thrust (“F-117 Engine Design ...,” 1990, p. 27). TF34-GE-100 This GE engine is a high-bypass-ratio turbofan engine used in the subsonic A-10 attack aircraft. It was first used in the Navy’s S-3A anti- submarine aircraft. The civilian variant, CF34, has been very success- fully grown to increased thrust levels and employed on regional jets. Under takeoff conditions, the TF34-GE-100 can produce 10,540 pounds of thrust (The Engine Handbook, 1998, p. 39). FUTURE ENGINES FOR AIR FORCE TACTICAL AIRCRAFT F119-PW-100 This is a low-bypass-ratio, mixed-flow afterburning turbofan being developed for the Air Force’s new F-22 fighter. The engine will enable the F-22 to supercruise (cruise supersonically without afterburning). The F119’s component designs push the state-of-the-art to give it ex- ceptional performance; it should also provide exceptional reliability. In fact, P&W’s YF119 was chosen for the F-22 over GE’s YF120, pri- marily due to the lower development risk, production cost, and ex- pected maintenance requirements (Bond, 1991). The F119 is equipped with a 2-D thrust-vectoring nozzle to enhance the F-22’s maneuverability. The engine’s full authority digital engine control is integrated with the aircraft’s flight control system. Further, this will be the first operational engine in which the low- and high-

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