The Northrop M2-F3 was a heavyweight lifting body rebuilt from the Northrop M2-F2 after it crashed at the Dryden Flight Research Center in 1967. It was modified with an additional third vertical fin - centered between the tip fins - to improve control characteristics. The M refers to manned and F refers to flight version.
Made by Northrop Corporation.
It is the successor of the NASA M2-F1 Northrop M2-F2 .