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__NOTOC__ The DuPont Aerospace DP-1 was a subscale prototype for a fixed-wing VSTOL transport aircraft, intended to take off and land like a helicopter and fly like an airplane. The fullscale aircraft, named DP-2, was designed to travel at high subsonic speeds with a greater range than its rotary-wing equivalent, and to allow troops to rappel from the aft cargo ramp. The development of the 53% scale DP-1 aircraft was originally funded as a manned vehicle. During the construction of the test aircraft, ONR program management changed the requirements, and mandated that the vehicle be tested as a UAV. This change added significant cost and time to the project, but in September 2007, the DP-1 autonomous prototype achieved sustained, controlled tethered hovers of 45 seconds at the Gillespie Field test site. On June 13, 2007, the U.S. House Committee on Science and Technology held a hearing about the fate of the DP-2.〔http://democrats.science.house.gov/Media/File/Commdocs/hearings/2007/oversight/12jun/hearing_charter.pdf〕 In August 2007, funding was finally cut, after a total of $63 million spent over nearly two decades.〔 ==References== *("DP-1 UAV achieves autonomous tethered hover" ) *("The Aircraft That Can't Fly; Congress' $63 Million Boondoggle" (ABC News) ) *(DP-2 Profile at Global Security ) *("Hunter's Folly: $63 Million Aircraft Can't Fly" (Wired) ) *("Heavily criticized plane is defunded" (Copley News Service) ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「DuPont Aerospace DP-1」の詳細全文を読む スポンサード リンク
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