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Competition aerobatics is an air sport in which judges rate the skill of pilots performing aerobatic flying. It is practiced in both piston-powered single-engine airplanes and gliders. An aerobatic competition is sanctioned by a national aero club, its designee, or in the case of international competitions, by the Fédération Aéronautique Internationale (FAI).〔(【引用サイトリンク】title=FAI Aerobatics Commission - CIVA )〕 The sanctioning body establishes the rules that apply to the competition, including entry qualifications for all participants, operating procedures and judging criteria. A pilot enters a competition in a ''category'' of his or her choice, which defines the level of difficulty of the aerobatic sequences flown. Within each category, a pilot flies one or more ''flight programs''. Each flight receives a total score from the judges; ranking each pilot's combined total scores for all flight programs within each category determines that category's winner.〔In some competitions, scores from the Known Program are used for qualifying purposes only and do not count to determine the final standings.〕 ==Categories== Five power categories are flown in the U.S. (and other states that adopt the U.S. model). They vary by difficulty of the individual aerobatic maneuvers they contain, as well as the combination of those maneuvers within the sequence. In order of increasing difficulty, the power categories are: * Primary * Sportsman * Intermediate * Advanced * Unlimited Some aero clubs include a Classic category for airplanes without inverted fuel and oil systems. The sequences flown are similar to those flown in the Sportsman category. Three glider categories are: * Sportsman * Intermediate * Unlimited Categories flown in a competition are announced in advance. 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「Competition aerobatics」の詳細全文を読む スポンサード リンク
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