Critical engine

Fig. 2. A400M, counterrotating propellers on each wing; the most important yawing moments after failure of #1 engine

The critical engine of a multi-engine, fixed-wing aircraft is the engine whose failure would most adversely affect the performance or handling abilities of an aircraft(§1.1). On propeller aircraft, there is a difference in the remaining yawing moments after failure of the left or the right (outboard) engine when all propellers rotate in the same direction due to the P-factor. On turbojet/ turbofan aircraft, there usually is no difference between the yawing moments after failure of a left or right (outboard) engine.

单词	Critical engine
释义	Critical engine 英语百科 Critical engine The critical engine of a multi-engine, fixed-wing aircraft is the engine whose failure would most adversely affect the performance or handling abilities of an aircraft(§1.1). On propeller aircraft, there is a difference in the remaining yawing moments after failure of the left or the right (outboard) engine when all propellers rotate in the same direction due to the P-factor. On turbojet/ turbofan aircraft, there usually is no difference between the yawing moments after failure of a left or right (outboard) engine.
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