(iii)The aircraft must on all occasions be eased gently off the
ground.
(iv) As the unstick speeds are a little higher than those of
aircraft fitted with slats, the take-off distances are
increased. The increase in distance is not marked and is
not readily apparent when taking off from a 2,000 yard
runway.
IV. Stalling
(i) Stalling in level flight :-
(a) The stalling characteristics are much the same at all
weights irrespective of the position of the under-
carriage, flaps, and air brakes; and with or without
drop tanks.
(b) With the flaps down, there is little warning of the
approach of the stall. A slight buffeting is
discernible 5-10 knots before the stall. With the
flaps up, a more noticeable buffet occurs commenc-
ing 5-10 knots before the stall.
(c) At or near the stall there may be a nose-up change
of trim with a reduction in the stick force required
to maintain the attitude. At the stall, either the rate
of descent increases markedly with the aircraft
remaining on a level keel, or the aircraft rolls fairly
quickly, usually to port, the nose yawing to the same
side.
(d) The roll-with-yaw behaviour occurs most frequently
when the flaps are down.
(e) Recovery is immediate when the control column is
eased forward, but the loss of height involved
before level flight is regained, is large. During the
recovery period fractional amounts of G will cause
marked buffeting and care must be taken until the
speed has increased considerably.
(f) Rudder is effective in checking the roll-with-yaw
motion; aileron is also effective, but whereas large
aileron movements are necessary, only a compara-
tively small amount of rudder is needed.
(g) The stalling speeds together with recommended
approach speeds are shown graphically on the oppo-
site page. It will be noticed that the presence of drop
tanks has a marked effect on the stalling speed.
(ii) Stalling under G
(a) The behaviour under G is practically the same as
that for the slatted aircraft; in all configurations,
warning is given by the onset of buffeting, the inten-
sity of which increases as the stall is approached.
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