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.
Did America's next stealth fighter just get revealed on Instagram?
X-44 MANTA The National Interest
Aviation, Page 5
The National Interest: Blog
NGAD, Page 2
Meet the X-44 Manta: What the New NGAD Stealth Fighter Will Look Like?
Did America's next stealth fighter just get revealed on Instagram?
Finally: America Releases New Super Fighter Jet X-44 MANTA Future
Finally, the X 44 Manta officially replaces the F 22 Raptor
Fighter of Discord: Is the Euro-Six Alive?
Will the NGAD be more maneuverable than the F22? - Quora
Why can't we make more F-22s? - Quora
Finally: USAF Upgrades X-44 MANTA To 6th Generation Fighter Jet
Big Emphasis On “Spectral Warfare” In US Air Force's Next