Unknown
| YF-22 "Lightning II" | |
|---|---|
 | |
| Role | Prototype fighter |
| National origin | United States |
| Manufacturer | Lockheed Corporation / Boeing / General Dynamics |
| First flight | 29 September 1990 |
| Primary user | United States Air Force |
| Developed into | Lockheed Martin F-22 Raptor |
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Design and development
The USAF's Advanced Tactical Fighter (ATF) program was conceived in the early 1980s, to provide a replacement for the F-15 Eagle.[1] The Air Force issued a request for proposals (RFP) for the fighter in September 1985, then modified the RFP to include flying prototypes in the final selection.[2] Proposals were submitted by Boeing, General Dynamics, Lockheed, Northrop, and McDonnell Douglas in July 1986.[3] Lockheed and Northrop were selected in October 1986 for the demonstration phase, ending in a flyoff of prototypes. The companies had previously agreed to form the Lockheed/ General Dynamics/Boeing team and Northrop/McDonnell Douglas team.[4]The Lockheed team designed the YF-22 and the Northrop team designed the YF-23. Two examples of each prototype were built for the Demonstration-Validation phase: one with General Electric YF120 engines, the other with Pratt & Whitney YF119 engines.[5][6]
The YF-22 was given the unofficial name "Lightning II", after the World War II fighter P-38, by Lockheed, which persisted until the mid-1990s when the USAF officially named the aircraft "Raptor".[7] The F-35 later received the Lightning II name in 2006.[8]
The YF-22 first flew on 29 September 1990.[9] Flight testing began afterwards and added the second aircraft for each competitor in late October 1990.[10] The YF-22 with GE engines achieved Mach 1.58 in supercruise.[11] Flight testing continued until December 1990. Following flight testing, the contractor teams submitted proposals for ATF production.[10]
Specifications (YF-22)
Note some specifications are estimated.
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