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The land speed record (or absolute land speed record) is the highest speed achieved by a person using a vehicle on land. There is no single body for validation and regulation; in practice the Category C ("Special Vehicles") flying start regulations are used, officiated by regional or national organizations under the auspices of the Fédération Internationale de l'Automobile.〔(【引用サイトリンク】title=FIA land speed records )〕 The record is standardized as the speed over a course of fixed length, averaged over two runs (commonly called "passes").〔(Regulations for Record Attempts - CHAPTER 2 ) - FIA〕 Two runs are required in opposite directions within one hour, and a new record mark must exceed the previous one by at least one percent to be validated. There are numerous other class records for cars; motorcycles fall into a separate class. == History == The first regulators were the ''Automobile Club de France'', who proclaimed themselves arbiters of the record in about 1902.〔 〕 Different clubs had different standards and did not always recognise the same world records〔 〕 until 1924, when the ''Association Internationale des Automobile Clubs Reconnus'' (AIACR) introduced new regulations: two passes in opposite directions (to negate the effects of wind) averaged with a maximum of 30 minutes (later more) between runs, average gradient of the racing surface not more than 1 percent, timing gear accurate within 0.01sec, and cars must be wheel-driven.〔Northey, p.1163.〕 National or regional auto clubs (such as AAA and SCTA) had to be AIACR members to ensure records would be recognized.〔Northey, p.1164.〕 The AIACR became the FIA in 1947. Controversy arose in 1963: ''Spirit of America'' failed on being a three-wheeler (leading the Fédération Internationale de Motocyclisme to certify the record when the FIA refused) and not wheel-driven so the FIA introduced a special wheel-driven class.〔Northey, p.1166.〕 No holder of the absolute record since has been wheel-driven. 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「Land speed record」の詳細全文を読む スポンサード リンク
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