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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 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 first YF-23 with P&W engines supercruised at Mach 1.43 on 18 September 1990 and the second YF-23 with GE engines reached Mach 1.72 on 29 November 1990. [N 11] [54] [56] The first YF-22 with GE engines achieved Mach 1.58 in supercruise and the second YF-22 with P&W engines also achieved Mach 1.43. Maximum speed of both prototype designs in ...
The Lockheed Martin/Boeing F-22 Raptor is an American twin-engine, all-weather, supersonic stealth fighter aircraft.As a product of the United States Air Force's Advanced Tactical Fighter (ATF) program, the aircraft was designed as an air superiority fighter, but also incorporates ground attack, electronic warfare, and signals intelligence capabilities.
The YF-104A was a pre-production aircraft used for engine, equipment, and flight testing; [22] 17 were built, with the first flight taking place on 17 February 1956 and reaching Mach 2 for the first time on 27 April. [223] F-104A This aircraft was the initial production single-seat interceptor version, very similar to the YF-104A. [224]
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 ...