Part II — The Ground and Air Instruction Syllabus — Exercise 15 — Side-Slipping
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To teach entry, practical use, and recovery from a side-slip.
Essential Background Knowledge
- The use of a side-slip:
- to lose excess height;
- in cross-wind landing techniques;
- in a slipping turn.
B. Side-slip entry procedure;
C. Attitude of an aircraft while side-slipping;
D. Control of yaw and bank;
E. Control of flight path;
F. Recovery procedure.
G. Consequences of incorrect recovery procedures;
H. Instrument indications.
(2) Question student on the exercise and clarify as necessary.
Advice to Instructors
(1) The side-slip and slipping turn should first be demonstrated and practised at altitude until the student learns how to use the controls. Subsequent demonstrations of the practical applications should be given near the ground.
(2) In some aircraft, the position of the pitot and static pressure sources cause the airspeed to give unreliable readings depending on the direction of slip. Emphasize the same attitude used in both left and right slips.
(3) When approaching to land using a side-slip to increase the rate of descent, the side-slip should always be made into the direction of the wind.
(4) A common fault is the tendency to lose speed during recovery, often resulting in a heavy landing. Emphasize the need to lower the nose slightly to recover in a correct descent attitude at a safe altitude and then continue with a normal approach.
(5) Emphasize the importance of the slipping turn. In most modern aircraft, as it is difficult to maintain direction in a side-slip with a moderate amount of bank, the slipping turn assumes greater importance, particularly in forced landings which are carried out without the use of flaps.
Instructor and Student Practice
(1) Complete safety precautions — cockpit checks, minimum altitude, look-out, etc.
(2) From a power-off descent demonstrate entry — apply bank, control yaw, and maintain correct attitude.
- Ground tracking;
- Varied rates of descent;
- Recovery techniques:
- level wings, control yaw, and adjust attitude for correct airspeed.
(4) Show how side-slip is used to correct for drift in cross-wind approach and landing.
(5) Slipping turns.
- Regulation of yaw;
- Attitude control during entry and recovery;
- Practical use.
(6) Show how, depending on the placing of the pitot and static source, the airspeed indicator may be unreliable in a side-slip.
(7) Instrument indications.
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