Flight Instructors Training Procedures _revised AIC_x

1. AIM
DEFINITION
EXERCISE 23
ASSYMMETRIC FLIGHT
(TWIN-ENGINE AEROPLANE – LOSS OF POWER)
Asymmetric flight is a condition of flight that will occur on a multi-engine aeroplane when an imbalance
in power/thrust exists about the normal axis.
WHAT THE INSTRUCTOR IS TO TEACH
i. Discuss the aerodynamic principles involved.
ii. The air exercise briefing:
a. Applicable procedures and check lists.
b. Aeroplane handling techniques:- Demonstration and Observation.
c. Considerations of airmanship and engine handling.
d. Similarity to previous exercises.
e. De-briefing after flight.
WHY IT IS BEING TAUGHT
To train the student how to plan for and recognise the failure of one engine and to control the
aeroplane safely during all phases of flight with one engine inoperative or partially inoperative; as well
as a good understanding and a thorough knowledge of the principles involved in:
i. The introduction to asymmetric flight.
ii. Effects and recognition of engine failure in all phases of flight.
iii. Methods of control and identification of the failed engine.
iv. Effects of varying speed, mass and power.
HOW THE EXERCISE APPLIES TO FLYING
i. Take-off and climb performance with one engine inoperative.
ii. Cruise altitude and aeroplane cruise performance with one engine inoperative.
iii. Approach and landing with one engine inoperative.
iv. Missed approach and go-around performance with one engine inoperative.
v. Considerations and use of flaps and undercarriage during single engine approach, landing and
overshoot.
2. PRINCIPLES INVOLVED
i. FORCES ACTING ON THE AEROPLANE.
With the aid of a diagram explain the following:
a. Forces and couples in symmetric flight.
b. Forces and couples in asymmetric flight.
c. Definition of the critical engine – Asymmetric blade effect.
d. Force required to counteract the yawing moment created by an engine failure and
particularly by the critical engine failure.
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