copilot's side and the controls used for normal spin recovery
techniques, The pilot should use the cut-off valve located in
the pilot's left control wheel handle to cut off the
PC
systeln
when employing spin recovery control procedu~ es.
THE
TRIM
SYSTEM
A
small control wheel on the floor between the front seats actu-
ates the adjustable stabilizer via a gear reduction and torque
tube linkage
which, actuates the empennage jack screw.
A
fric-
tion lock is provided on the pilot side of the
trim control ped-
estal. Rotating the friction screw clockwise increases
trim
friction. The position of the stabilizer is indicated by a pointer
on the aft side of the nose wheel well, The
intern~ediate mark
in the pointer range is the normal take-off setting of the trim
control. The trinl system also changes the setting of the trim
bungees connected to the elevator horns to obtain trill? assist
froin the elevators.
FLAPS
The wide span flaps are hydraulically controlled by a hand oper-
ated pump which actuates
a
hydraulic cylinder.
A
relief valve
is provided which releases the flaps as a slow rate as the springs
(or air pressure) raise
thein. Hydraulic fluid used
is
the same
as the brake system fluid and
is
stored in the brake reservoir
on the aft side of the firewall. To lower the flaps, first set the
flap-shaped control (adjacent to the flap handle) in the down
position. Then
punip the handle to obtain the desired setting:
two strokes for take-off; four and one-half strokes for full de-
flection or any intermediate setting. To raise the flaps, place
the control in the up position, The flaps will then rise as a con-
trolled rate to the up position or they
may be stopped at an in-
termediate position by placing the control in the down position
again. The position of the flaps is indicated by a pointer on the
aft side of the nose wheel well. The intermediate
mark in the
pointer range
is
the flap take-off setting.
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