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PART III-HANDLING

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A.L.3
Page 65
limitations, G should not be increased beyond the initial buffet stage at speeds above 0.85M at heights below 25,000 ft. 69. Aerobatics The following are the recommended minimum speeds, in knots, for aerobatics until experience is gained:- Roll (full aileron) ... ... ... 350 Loop ... ... ... ... 460 Roll off ... ... ... ... 480 Vertical roll ... ... ... ... 520 70. Spinning (a) Intentional spinning is prohibited. (b) The aircraft is not prone to spin off a stall, either in level or turning flight. (c) As a result of tests the following actions are recommended in the event of a spin developing:- (i) Apply full opposite rudder and ease the stick forward taking care to ensure that the ailerons are central. If in doubt release the handgrip and allow the feel spring to centre the ailerons. (ii) If the undercarriage and flaps arc down they should be retracted immediately. (iii) Maintain full rudder until all rotation has ceased. Centralise the controls quickly when the spin stops. (iv) If the aircraft stops in a steep nose-down attitude, extending the airbrakes will enable a tighter pullout to he made. (v) If the aircraft is beyond the vertical when the spin stops, less height will be lost if it a half rolled before pulling out, but the ailerons must be used very gently. (d) Flight tests with a ventral drop tank have not been made, but evidence from model tests shows that the tank does not affect a spin recovery and jettisoning the tank during the spin may cause damage to the wing. The tank should not therefore be jettisoned. Note.-1. The normal characteristics are a slow rate of spin with considerable oscillation in pitch, the nose dropping steeply down and rising almost to the horizon once in each turn. Recovery action is effective at once when taken with the nose up and within half a turn with the nose down. A moderate force is required to apply opposite rudder and a light force to hold the stick forward. 2. Some spins vary from Note 1 as regards recovery charac- teristics and are as follows:- A very light force is required to apply the opposite rudder and a marked degree of sideslip may be felt. This is usually followed by a sudden increase in the rate of spin which may continue with the aircraft pointing steeply down for a further 1 or 1½ turns before stopping. 3. Height loss will nary considerably but the average height involved in making one turn of a spin and recovery to level flight is about 9,000 ft. 4. It is recommended that the aircraft be abandoned if a spin occurs below 15,000 ft. or if a spin which has developed above this height has not been stopped by 10,000 ft.

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