PART 1II-HANDLING
(c) Maximum rate
Set throttles closed, airbrakes out, and maintain 0.7M until
350 knots is reached. The rate of descent will be approxi-
mately15,000-20,000 ft. per minute. This descent can be
used in cases of operational necessity; misting will be con-
siderable at lower altitudes although the front windscreen
will normally remain clear if a landing is made shortly after
the descent. In any case, a reserve of fuel should be kept to
give time to clear the misting. (See para.58(c).)
CIRCUIT PROCEDURE AND LANDING
67. Circuit procedure
NOTE:-30 gallons of fuel per engine should be allowed
for the circuit and landing.
(a) Joining
Reduce speed to 200 knots, select 1/3 flap and set 10,500
r.p.m. to give a speed of 170 knots downwind.
(b) Checks before landing
Airbrakes IN
Undercarriage Down below 175 knots
Lever fully down
Three green lights
Nosewheel indicator showing
Brakes Pressure
Operation (120 lb./sq.in. at
each wheel
Off-individual wheel-brake
needles reading zero
Flaps One-third down
Fuel Contents
Balance cock as required
Harness Tight and locked
NOTE:-If the aircraft is yawed at speeds below 170 knots
with the airbrakes out, the nose may drop sud-
denly and the elevators become ineffective until
the yaw is removed, or the airbrakes retracted. The
tendency is aggravated if a ventral tank is fitted.
Airbrakes should not be used at airspeeds below
170 knots at circuit height and should be in before
the undercarriage is lowered. 50
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