Development history
mediumX-44 MANTA was a tailless aircraft concept study, not a flown demonstrator.
The X-44 MANTA was a Lockheed Martin tailless aircraft concept studied by NASA and the U.S. Air Force as part of broader X-plane and control-effector research. NASA's American X-Vehicles history treats it as a speculative artist concept rather than a flown X-plane. This distinction is critical: X-44 is a concept study, not a prototype aircraft with a flight record.



