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PART III-HANDLING
applied while reducing speed. The speeds and
characteristics described are typical for an aircraft with
wheels and flaps down, carrying full ammunition and
with ½ fuel remaining but without a belly tank fitted.
Speed (knots) Remarks
200 to 150 Progressively increasing left rudder trim is
required to counteract the effect of the
nosewheel door.
150 to 140 Slight directional wandering which should
be corrected with rudder before the associ-
ated roll is counteracted with aileron.
Slight buffet.
135 to 120 Increase in buffet to a high intensity,
increase in rate of sink.
115 Very high rate of sink now present and
possible wing drop. If this stage is reached
recovery action must be taken immediately.
Note.-These speeds increase by about 5 knots when a
drop tank is fitted.
(b) Coarse use of the ailerons may produce marked yaw in
the opposite direction to that in which aileron is applied.
This is not so likely to occur when the aircraft is being
"pushed out" of the stall, i.e. when G is below 1, but
whenever it occurs the aileron should be centralised and
the wing picked up with rudder.
68. High speed stalling
(a) Below 0.85M the aircraft is stable at the G stall, marked
by buffeting which increases to strong, before the stage
is reached where further application of elevator does not
increase the G. In this condition coarse use of the
aileron causes the aircraft to yaw.
(b) Between 0.85M and 0.95M the stick force lightens off as
G is increased above the value at which buffet sets in.
Further increase of G results in a mild pitch-up which
requires a rapid forward movement of the stick to check.
In order to avoid the possibility of exceeding the airframe64
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