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An electric aircraft is an aircraft that runs on electric motors rather than internal combustion engines, with electricity coming from fuel cells, solar cells, ultracapacitors, power beaming,〔(Power Beaming )〕 or batteries. Currently flying electric aircraft are mostly experimental demonstrators, including manned and unmanned aerial vehicles. Electrically powered model aircraft have been flown since the 1970s, with one report in 1957.〔 The first man-carrying electrically powered flights were made in 1973.〔 In 2015, a manned, solar-powered plane, Solar Impulse, began a planned 5-month circumnavigation of the Earth.〔 ==History== In 1883, Gaston Tissandier was the first to use electric motors in airship propulsion. The following year, Charles Renard and Arthur Krebs flew La France with a more powerful motor.〔 Electric motors have been used for model fixed-wing aircraft since from at least 1957, with a challenged claim from 1909. In 1964, William C. Brown demonstrates on CBS News with Walter Cronkite a model helicopter that receives all of the power needed for flight from a microwave beam. In 1973, Fred Militky and Heino Brditschka converted a Brditschka HB-3 motor glider to an electric aircraft, the Militky MB-E1, the first man carrying, full size aircraft to fly solely under electric power. Heino flew it for 14 minutes that same year.〔(electric HB-3 )〕 In 2007, the non-profit CAFE Foundation held the first Electric Aircraft Symposium in San Francisco.〔(CAFE Foundation 2011 CAFE Foundation Electric Aircraft Symposium V Announced )〕 The first electric registered aircraft makes its first flights the 2007-12-23 : BL1E "Electra" (F-PMDJ).〔(Article in The Times: Air travel swiches to electricity )〕 In 2009, a team from the Turin Polytechnic University made a conversion of a Pioneer Alpi 300. It flew 250 km/h for 14 minutes.〔(Pioneer Alpi 300 electric conversion )〕 By 2011, the use of electric power for aircraft was gaining momentum. At AirVenture in that year the ''Electric Aircraft World Symposium'' was held and attracted wide attention. It was sponsored by GE Aviation and included presentations by US Air Force, NASA, Sikorsky Aircraft, Argonne National Labs and the US Federal Aviation Administration. 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「electric aircraft」の詳細全文を読む スポンサード リンク
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