… V R is determined to satisfy this condition. For safety reasons, transport aircraft are also designed to handle the case where one engine stops during takeoff roll. If one engine stops before reaching a predefined V 1 (critical engine failure speed), the aircraft must abandon the takeoff and brake to decelerate and stop. If one engine stops after exceeding V 1 , the aircraft must continue the takeoff with the remaining engine. In Figure 3, the longest of the following three is called the required runway length for takeoff: (1) the horizontal distance from the start of takeoff to reaching an altitude of 35 feet if one engine stops at exactly V 1 , (2) the horizontal distance if the aircraft abandons takeoff and decelerates to a stop, and (3) 115% of the distance from the start of takeoff to reaching an altitude of 35 feet when all engines are operating. This value must be shorter than the length of the available runway. … *Some of the terminology that refers to "critical engine failure speed" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…VRはこの条件を満足するように決められるのである。輸送機では,安全のために離陸滑走中に一つのエンジンが停止した場合のことも考えられていて,もしあらかじめ定められたV1(ブイワン)(臨界点速度critical engine failure speed)に達する前に1エンジンが停止したら,離陸をあきらめブレーキをかけて減速停止,V1を超えてから1エンジンが停止したら,残りのエンジンで離陸を続けることに定められている。図3で,(1)ちょうどV1で1エンジンが停止した場合に離陸を始めてから高度35フィートに達するまでの水平距離と,(2)離陸をあきらめて減速停止した場合の水平距離,(3)全エンジンが作動しているとき,離陸開始地点から高度35フィートに達するまでの距離の115%の三つのうち,いちばん長いものを離陸必要滑走路長といい,この値は利用できる滑走路の長さより短くなければならない。… ※「critical engine failure speed」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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