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IS-4 Jastrząb : ウィキペディア英語版 | IS-4 Jastrząb
The IS-4 Jastrząb (''Instytut Szybownictwa'' – gliding institute) was a single-seat aerobatic glider designed and built in Poland from 1949. == Development == The IS-4 was built for aerobatics with a high structural strength and a very high maximum speed which could not be achieved in a vertical dive. Due to the pilot's sitting position and the arrangements of the controls, it was difficult for pilots to exceed the 8g loading limit. During high speed flight it was possible for the air-brakes to be sucked out violently, so most pilots ensured that they remained closed by holding the airbrake control.〔
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「IS-4 Jastrząb」の詳細全文を読む
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