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Gulfstream X-54
The Gulfstream X-54 is a proposed research and demonstration aircraft, under development in the United States by Gulfstream Aerospace for NASA, that is planned for use in sonic boom and supersonic transport research.
==Design==
Initiated during 2008, the X-54 project is intended to produce an experimental aircraft capable of supersonic speeds with a formed sonic boom that is acoustically shaped to mitigate noise pollution.〔Jane's 2010.〕 The X-54A is intended to demonstrate low-boom sonic effects in population impact studies in support of future supersonic transport design and regulation.〔DOD 2009.〕 Current regulations prohibit supersonic flight over land areas in the United States; the X-54 is part of NASA's efforts to have the regulations altered to allow for supersonic transports to be commercially viable.
NASA's X-54 project is intended to continue the research objectives of the DARPA Quiet Supersonic Aircraft,〔(【引用サイトリンク】url = http://www.spacedaily.com/news/plane-sonic-02b.html )〕 and is intended to demonstrate low-boom technologies and methods validated by projects such as the NASA Quietspike project, the Shaped Sonic Boom Demonstrator, FaINT Project,〔(【引用サイトリンク】url = http://www.nasa.gov/topics/aeronautics/features/faint_sonic_booms.html )〕 and WSPR Project. The X-54 will be designed from the ground up to incorporate all the technology and lessons learned from this combined NASA research spanning several decades into a viable aircraft capable of producing under 75 pdB on the ground while cruising over Mach 1.4 above 50,000 feet. The X-54 aircraft will demonstrate low-noise supersonic flight for use in community base testing to provide research data to reform domestic and international regulations on supersonic over-land flight.
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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