The LTV L450F, also known as the L45ØF,[1] was a prototype quiet reconnaissance aircraft, developed by Ling-Temco-Vought in the late 1960s for use in the Vietnam War by the United States.

Based on the airframe of a Schweizer 2-32 sailplane, the aircraft flew in 1970, and was developed into the XQM-93 reconnaissance drone before the project was cancelled.

Developed as a follow on to the Igloo White program, the L450F was intended to provide a quiet reconnaissance and communications relay aircraft.

Four examples of the XQM-93 were contracted for by the United States Air Force, however the Compass Dwell project was subsequently cancelled.

[1][2] 27 March 1972 Donald R. Wilson reached the altitude of 15,456 m (50,708 ft) in horizontal flight flying the remaining L450F, registered N2450F, setting a new Fédération Aéronautique Internationale international record, Class C-1c, Group II[3] (Powered aeroplanes, takeoff weight 1000 to 1750 kg, turboprop).