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Yamaha R-MAX
The Yamaha R-MAX is a Japanese unmanned helicopter developed by the Yamaha Motor Company in the 1990s. The two-bladed, gasoline-powered aircraft is remote-controlled by a line-of-sight user; it was designed primarily for agricultural use, and is capable of precise aerial spraying of crops. The R-MAX has been used in Japan and abroad for agriculture and a variety of other roles, including reconnaissance, disaster response and technology development.
==Development==
The Yamaha R-MAX and its predecessor, the Yamaha R-50, were developed in the 1990s in response to demand in the Japanese market for aerial agricultural spraying. Fixed-wing manned crop dusters had been in use in Japan for many years, but the small size of most Japanese farms meant that this method was inefficient. Manned helicopters were sometimes used for spraying, but were very expensive. The R-MAX allowed much more precise small-scale spraying, at a lower cost and lower risk than manned aircraft.〔Sato, Akira. ("The R-MAX Helicopter UAV" (PDF) ). DTIC.mil. 2 September 2003. Retrieved 30 October 2014.〕 The R-MAX was approved for operation in the United States by the Federal Aviation Administration in 2015.〔("R-MAX authorisation" (PDF) ). FAA. 2015. Retrieved 7 August 2015.〕
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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