CR-MM-1-0-00
PS-28 Cruiser
PS-28N Cruiser
CHAPTER 6 – CONTROL SYSTEM
Date of issue: 2011-11-08
Revision No.: 2
6 - 21
Lateral control
Measure play at the end of the control stick by the measuring instrument from the fuselage side
at blocked ailerons in the neutral position. First block the right aileron and measure play on the
control stick, then measure play at the blocked left aileron. Total play of the control stick must
not exceed 4 mm (
5/32 in
) at the end of the control stick.
Play in foot control pedals
Measure play at the end of pedals by the measuring instrument from the inner wall of the
bulkhead No.1 at the blocked rudder at neutral position. Mutual total play between pedals must
not exceed 4.8 mm (
3/16 in
) on the pedal tube.
Play in trim tab control
Measure play in elevator neutral position. Set the balance tab to position “max on head" and
measure play at the end of the trim tab. Max play of the trim tab measured at the end of the
trailing edge must not exceed 3.2 mm (
1/8 in
).
Play in wing flap control
Measure play in individual position of wing flaps (0°, 10°, 20° and 30°). Set the flap actuator to
individual positions. Measure play in wing flap control on the wing flap trailing edge. Max play of
the wing flap measured on the trailing edge must not exceed 4.8 mm (
3/16 in
).
6.4.2 Check of friction in control system
Control system must function smoothly within the whole scope of deflections. There must not be
excessive friction or hitching in the control system. In case of failure detection, find out the cause
and eliminate the defect.
Friction in the longitudinal control system
a) Balance elevator through the pulley to get it to neutral position.
b) Measure force by the dynamometer attached on the end of the control stick. Move the
control stick from fully forward position to neutral and measure force. Then slowly move
stick forward and measure force. Subtract forces from each other. Max. force can be
0.9 kg (
2 lbs
).
Friction in lateral control system
a) Set ailerons to neutral position.
b)
Measure force at the
moment od aileron deflection from neutral position by the
dynamometer attached on the end of the control stick. Max. force can be 0.6 kg
(
1.3 lbs
).
Friction in directional control system
a) Pushing move the rudder to max. L / R position.
b) Slowly move the rudder back to neutral position. Maximal permissible residual deflection of
the rudder is on edge of central covering sheet (see Fig. 6-16).
