The Rockwell-Messerschmitt-Bölkow-Blohm X-31 is an experimental jet aircraft designed to test fighter thrust vectoring technology. It was designed and built by Rockwell and Messerschmitt-Bölkow-Blohm,
The X-31 aircraft returns from a test flight for VECTOR.
The Grumman X-29 is an American experimental aircraft designed to test a forward-swept wing, canard control surfaces, and other novel aircraft technologies. Funded by NASA, the United States Air Force
Rockwell-MBB X-31
…Aircraft of comparable role, configuration, and era Grumman X-29 High Alpha Research Vehicle…
A Grumman X-29 in flight
X-29 cockpit
X-29 with aft control surfaces deflected
Grumman X-29A at the National Museum of the United States Air Force