PART III - HANDLING
necessary to ease the control column forward and retrim
nose-down to prevent a sudden increase in G caused by
the nose-up trim change as speed falls through 0.95M
and because of the increasing effectiveness of the tailplane
and elevator.
76. Aerobatics
(a) Until experience is gained, the following speeds, in knots,
are recommended:-
Roll 350
Loop 425
Roll off the top 450
Vertical roll 500
(b) It is recommended that until experience is gained loops
are started in the height band 10,000 ft. to 15,000 ft.
77. Spinning
(a) Intentional spinning is prohibited. The following inform-
tion is provided to acquaint pilots with the spin charac-
teristics and recovery action in case the aircraft is spun
inadvertently.
(b) When pro-spin controls are applied at the stall the air-
craft rolls on to its back and enters the spin with the nose
about 40° below the horizon. The attitude then becomes
normal and the first turn is steady with a slow rate of
rotation. During succeeding turns hesitation and marked
variations in the rate of rotation occur, with associated
pitching and rolling. When spinning in either direction
the ailerons should be held neutral as out-spin aileron will
cause the spin to become erratic.
(c) Normal recovery action is effective particularly if it co-
incides with the aircraft hesitations. Full forward stick
movement may be necessary When rotation ceases, the
controls should be centralized immediately otherwise the
aircraft may enter a spin in the opposite direction. If a
spin occurs with undercarriage and flaps down they should
be retracted immediately.
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