5 / 20
An aircraft suffers an engine failure on a light twin aircraft after take-off. Which of the following actions are appropriate?
  • A
    Bank 7 to 10 degrees, and rudder towards the dead engine.
  • B
    Bank 3 to 5 degrees, and rudder towards the live engine.
  • C
    Bank 3 to 5 degrees, and rudder towards the dead engine.
  • D
    Bank 7 to 10 degrees, and rudder towards the live engine.

Refer to figure.
COUNTERACTING ASYMMETRIC THRUST

Rudder to Stop Yaw - Bank Towards Live Engine - This method produces minimum drag and gives the best ability to climb and is the preferred method of putting the aircraft in equilibrium following engine failure.

In the event of an engine failure in a non-centerline thrust twin or multi engine aircraft, the operative engine is going to create a strong yawing moment about the vertical axis of the aircraft in the direction of the dead engine. Uncorrected, this results in a forward slip toward the side of the good engine and, when combined with the fuselage blanking airflow over the wing on the dead engine side, a rolling moment also develops about the longitudinal axis in the direction of the dead engine.

  • The typical action is to apply rudder in the direction of the live engine to counteract this forward slip. However, while the nose will be aligned with the desired flight path doing this, the actual flight path is a side slip towards the dead engine side, which creates excess drag.
    The only available counter to this is to bank the airplane into the direction of the live engine to counteract the rudder force using the horizontal component of lift. The angle of bank must not exceed 5°, to prevent excessive loss of vertical lift component.

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.