引用:
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作者TomGordon
"只要引擎推力夠大、電腦夠強，一個冰箱都可以飛上天"
這件事情並沒有違反任何物理特性 往上的力量大於重力 東西就會往上跑
就像人類把火箭送上太空一樣 要做的只是如何maintain "positive control"
我說的事情是 一架原本有尾翼的飛機 飛到一半沒了尾翼 不管它是被撞掉 背炸掉 還是尾翼不爽飛自己跑掉
有誰還可以維持飛機控制的?
JAL123 組員所做的一切 雖然他們盡了最大的努力 但講實在只是垂死的掙扎
從失去尾翼的那一刻開始 這架飛機的命運就決定了
only a matter of when and where
他們失去了絕大部分的vertical stabilizer還有液壓
就算不失去液壓 他們能安全落地的機率也非常的低
看過黑豬肉兄的一些文章 你應該是飛過飛機的
更不可能不知道 任何一片翼面 控制面 對飛機的穩定 與控制都是非常重要的
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那是因為在氣動力學上, 商用機一般都是靜穩定設計(707, 747 的各個控制面保持neutral 就會接近於平飛), 要求運動敏捷的軍機才是非靜穩定設計 (F-16, F-117 的各個控制面要不斷以電腦微調才能保持平飛). 所以 ....
(e.g. F-16
http://en.wikipedia.org/wiki/F-16
"the inherent negative stability of the aircraft, a trait which trades stable flight for increased maneuverability"
Negative static stability
An aircraft with negative static stability will, in the absence of control input, depart from level and controlled flight. Most aircraft are designed with positive static stability, where a plane tends to return to its original attitude following a disturbance. However, positive static stability hampers maneuverability, as the tendency to remain in its current attitude opposes the pilot's effort to maneuver; therefore, a plane with negative static stability will be more maneuverable. With a fly-by-wire system, such a plane can be kept in stable flight, its instability kept in check by the flight computers.
The YF-16 was the world's first aircraft to be slightly aerodynamically unstable by design. This feature is officially called "relaxed static stability." At subsonic speeds, the airplane is constantly on the verge of going out of control. This tendency is constantly caught and corrected by the FLCC (Flight Control Computer) and later the DFLCC (Digital Flight Control Computer), allowing for stable flight. When supersonic, the airplane exhibits positive static stability due to aerodynamic forces shifting aft between subsonic and supersonic flight.
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