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The Lockheed/ Boeing/ General Dynamics YF-22 is an American single-seat, twin-engine, stealth fighter technology demonstrator prototype designed for the United States Air Force (USAF). The design team, with Lockheed as the prime contractor, was a finalist in the USAF's Advanced Tactical Fighter (ATF) competition, and two prototypes were built ...
YF119-PW-100L: Prototype engine for the YF-22; rated 30,000 lbf thrust class. YF119-PW-100N: Prototype engine for the YF-23; rated 30,000 lbf thrust class. F119-PW-100: Production engine for the F-22A with larger fan and increased bypass ratio (BPR) rated for 35,000 lbf thrust class. YF119-PW-611: Prototype engine for the X-35.
The YF120 had different nozzle designs for the YF-22 and YF-23 technology demonstrator prototypes tailored to the specific airframe. The YF120 on the YF-22, registration number N22YF, was equipped with thrust vectoring nozzles. The engine for the YF-22 featured a two-dimensional thrust vectoring nozzle that could vector in the pitch direction ...
The Advanced Tactical Fighter (ATF) was a program undertaken by the United States Air Force to develop a next-generation air superiority fighter to replace the F-15 Eagle in order to counter emerging worldwide threats in the 1980s, including Soviet Sukhoi Su-27 and Mikoyan MiG-29 fighters under development, Beriev A-50 airborne warning and control systems (AWACS), and increasingly ...
Both aircraft were fully retired in 2009 and stored at Edwards Air Force Base. 1982 Never 2 [79] YF-22: Stealth fighter/technology demonstrator Lockheed / Boeing / General Dynamics Competed against the YF-23 in the Advanced Tactical Fighter (ATF) program. Further developed into the F-22. 1990 Never 2 YF-23: Stealth fighter/ technology demonstrator
The aircraft had single-expansion ramp nozzles (SERN) and, unlike the YF-22, did not employ thrust vectoring. [29] As on the B-2, the exhaust from the YF-23's engines flowed through troughs in the aft deck lined with heat-abating tiles to shield the engines from infrared homing (IR) missile detection from below.
The ATF engine was also being competed which is why there were two YF-22s and YF-23s, one for each engine option. The winner of the engine competition would be announced alongside the ATF winner. The ATF SPO had originally planned to select 4 companies as finalists for Dem/Val, but this was judged too expensive and unnecessary, so they reduced ...
The YF-22 and YF-23 in formation during flight testing in the early 1990s The squadron was first activated as the 6511th Test Squadron in March 1989 to conduct the Advanced Tactical Fighter program. It began flying the Northrop YF-23 on 27 August and the Lockheed YF-22 on 29 September 1990, flying both through December 1990, though the ...