Blow out

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Blow out occurs when the tail rotor is no longer able to generate sufficient thrust to maintain the helicopter's heading; the tail will rapidly swing around as the helicopter weathervanes, potentially disorienting the pilot.

Blow out most frequently occurs during fast backwards flight. As the tail comes further out of line, the force needed to correct it increases rapidly, and particularly with cheaper gyros, will happen quicker than the gyro can adjust for. It can also occur in sideways or pirouetting flight, especially if combined with high collective or cyclic pitch demands, sapping power from the tail rotor.

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