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ultralight aviation
Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1 or 2 seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional 3-axis control aircraft with ailerons, elevator and rudder, calling the former "microlight" and the latter "ultralight".
During the late 1970s and early 1980s, mostly stimulated by the hang gliding movement, many people sought affordable powered flight. As a result, many aviation authorities set up definitions of lightweight, slow-flying aeroplanes that could be subject to minimum regulations. The resulting aeroplanes are commonly called "ultralight aircraft" or "microlights", although the weight and speed limits differ from country to country. In Europe the sporting (FAI) definition limits the maximum take-off weight to ( if a ballistic parachute is installed) and a maximum stalling speed of . The definition means that the aircraft has a slow landing speed and short landing roll in the event of an engine failure.〔Boric, Marino, ''Spoilt For Choice'', Bayerl, Robby; Martin Berkemeier; et al (editors): ''World Directory of Leisure Aviation 2011-12'', page 10. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X〕
In most affluent countries, microlights or ultralight aircraft now account for a significant percentage of the global civilian-owned aircraft. For instance in Canada in October 2010, the ultralight aircraft fleet made up to 19% of the total civilian aircraft registered. In other countries that do not register ultralight aircraft, like the United States, it is unknown what proportion of the total fleet they make up. In countries where there is no specific extra regulation, ultralights are considered regular aircraft and subject to certification requirements for both aircraft and pilot.
== Definitions ==
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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