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LTV L450F
The LTV L450F, also known as the L45ØF,〔 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.
==Design and development==
Developed as a follow on to the Igloo White program, the L450F was intended to provide a quiet reconnaissance and communications relay aircraft.〔Jane's 1971, p. 344-345〕 Under a $1 million USD contract by LTV Electrosystems, the L450F was developed from a Schweizer SGS 2-32 sailplane, modified by Schweizer to LTV's specifications.〔
These modifications included stronger wing spars, thicker wing skin, installation of a Pratt & Whitney PT6A turboprop engine driving a three-bladed propeller, and main landing gear based on that of the Grumman Ag-Cat agricultural aircraft.〔 An alternative configuration, using a piston engine, was also proposed.〔
The prototype L450F first flew in February 1970, but was destroyed during its third flight, on 23 March that year, the pilot successfully bailing out. A second prototype was then completed and flown, successfully completing the testing program, and a third prototype was ordered as the unmanned XQM-93 drone, under the Compass Dwell project. Four examples of the XQM-93 were contracted for by the United States Air Force, however the Compass Dwell project was subsequently cancelled.〔〔Goebel, Greg. ("The Prehistory of Endurance UAVs" ). ''VectorSite''. Accessed 2010-06-18.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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