The X-24B made its 36th and last flight on November 26, 1975. It was delivered to the Notional Air Museum in November 1976.
Martin X-24B
In 1972 the X-24A was stripped to its basic framework and rebuilt as the X-24B with a more stable configuration. The new body was delta-shaped and had twice the lifting surface of the X-24A. On August 5, 1975, the X-24B made the first landing of a lifting body on a conventional runway.