翻訳と辞書 Words near each other ・ Cooperative Livestock Company, Ardestan ・ Cooperative Living Organization ・ Cooperative luminescence and cooperative absorption ・ Cooperative Marketing Act ・ Cooperative movement in India ・ Cooper Union financial crisis and tuition protests ・ Cooper Union speech ・ Cooper University Hospital ・ Cooper v Die Meester ・ Cooper v Hobart ・ Cooper v Phibbs ・ Cooper v Wakley ・ Cooper v. Aaron ・ Cooper v. Oklahoma ・ Cooper v. Pate ・ Cooper vane ・ Cooper Village Archeological Site ・ Cooper Vuna ・ Cooper Wallace ・ Cooper Wheelock ・ Cooper Willyams ・ Cooper Wiring Devices ・ Cooper's (bakery) ・ Cooper's Bluff Site ・ Cooper's Camp ・ Cooper's Cave ・ Cooper's Corners ・ Cooper's Falls, Ontario ・ Cooper's Green ・ Cooper's hawk Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Cooper vane ： ウィキペディア英語版 Cooper vane A Cooper vane (also sometimes called a Dan Cooper switch or D.B. Cooper device) is a mechanical aerodynamic wedge that prevents the ventral airstair of an aircraft from being lowered in flight. In the United States, following three hijackings in 1972, the Federal Aviation Administration ordered that Boeing 727 aircraft be fitted with Cooper vanes. The device was named for an unidentified airplane hijacker dubbed D. B. Cooper, who used the rear stairway to exit a Boeing 727 in flight and make his escape via parachute. The Cooper vane is a very simple device consisting of a spring-loaded paddle connected to a plate. When the aircraft is on the ramp, the spring keeps the paddle perpendicular to the fuselage, and the attached plate does not block the stairway. As the aircraft takes off, the airflow pushes the paddle parallel to the fuselage and the plate is moved underneath the stairway, preventing it from being lowered. Once the airflow decreases on landing, the spring-loaded paddle returns to its initial position, thereby allowing the stairs to be lowered again. Although this device was intended to prevent hijackings aboard the 727 and other aircraft with a ventral airstair, many airlines sealed the airstair entirely, never to use it again. Douglas DC 9 aircraft with ventral stairs were also equipped with Cooper vanes. The DC 9-21 used for skydiving at the 2006 World Free Fall Convention in Rantoul, Illinois, had one installed, but since the rear pressure bulkhead door and the stairs had been removed to facilitate fast jumper exits, the vane, which was left in place, did not prevent jumps.〔(Photo ) of aircraft with rear door removed. Accessed February 10, 2012〕 == References == 〔 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「Cooper vane」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.