This was originally the jet-powered Martin SV-5J, a derivative of the X-24A lifting body built for flight training but never flown. For display purposes, the SV-5J has been modified to represent the X-24A. Martin donated it to the USAF Museum in 1971.

This was originally the jet-powered Martin SV-5J, a derivative of the X-24A lifting body built for flight training but never flown. For display purposes, the SV-5J has been modified to represent the X-24A. Martin donated it to the museum in 1971. In 1973 the actual X-24A 66-13551, which made 12 gliding tests in 1969 and 1970 dropped from a NASA modified B-52, was converted into the radically different 'flat-iron' X-24B on display alongside