The Air Force’s—and NASA’s—motivation behind the X-44 Manta project, starting in 1999, was to test the feasibility of full yaw, pitch and roll authority without tailplanes (horizontal or vertical), with attitude control relying purely on 3D thrust vectoring.
Aviation, Page 5
Details About Navy's Secret New Fighter Jet: F/A-XX Facts, Images
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Aviation, Page 5
x 44 manta towards 6th generation, the F 35 and F 22 are shifted