Lockheed Martin F-22 Raptor
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The Lockheed Martin–Boeing F-22 Raptor is an American twin-engine, jet-powered, all-weather, supersonic stealth fighter aircraft. As a product of the United States Air Force's Advanced Tactical Fighte
An F-22 over Kadena Air Base, Japan, in 2009
ATF SPO Patch, 1990
An EMD F-22 alongside the Flying Test Bed
An EMD F-22 refuels from a KC-135 during testing; the attachment on the back top is for a spin recovery chute.
Northrop YF-23
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The Northrop–McDonnell Douglas YF-23 is an American single-seat, twin-engine, stealth fighter prototype technology demonstrator designed for the United States Air Force. The design team, with Northrop
YF-23 flying over Edwards Air Force Base
Diagram of several designs submitted for ATF RFI, showing the comparatively small sizes of Northrop's initial designs
From left to right, flat-plate models of Northrop's AMF, USF ("Christmas Tree"), and HSF design concepts. HSF was the preferred concept by 1985.
Northrop's DP110 submission for Dem/Val RFP, which was similar to the eventual YF-23