DG Flugzeugbau DG-800A, Руководство по обслуживанию, Страница: 21 / 163

Maintenance Manual DG-808C
Issued: May 2012 TN800/41 1.8
1.5 Airbrake control, wheelbrake
1.5.1 Control circuit
see diagrams 3 and 4)
The wheelbrake cable is connected to the airbrake torsion shaft (part 8St12).
1.5.2 Adjustment
a) Airbrake overcentre locking force:
Adjust the airbrake rod in the airbrake box so that both airbrakes retract
evenly and that the overcentre locking force on the airbrake operating handle
is between 15 - 20 daN (33-44 lbs.). Adjustment can be done with a 13mm
open end spanner.
b) Airbrake extension height.:
When adjusting the wheel brake check that the airbrake levers in the wings
6F11 are at an angle of 5°÷ 10° from the vertical with wheel brake fully
actuated.
c) Wheel braking force:
Drum brake: With insufficient braking effect, the wheel- brake can be
adjusted by a screw on the end of the Bowden cable housing, located on the
forward undercarriage fork above the brake actuating lever.
Hydraulic disc brake: Adjustment is at the turnbuckle between main brake
cylinder and airbrake control shaft.
d) Adjustment interconnection with wing flap control:
The airbrake control has to be adjusted, so that with the airbrakes fully
extended (rear stop at the seat back bulkhead) the wing flap handle will be
moved to a position approx. 10 mm (.4 in.) aft of the +5° notch. Adjustment
at the rod ends of the pushrods 6St13 and 6St14/1.
Check the total travel. (See 1.5.3)
1.5.3 Airbrake stops
The rear airbrake control circuit stop is located at the seat back bulkhead. The
total travel must be min. 215 mm (8.46 in.). For adjustment, see above. The
stop, in locked direction is situated at the wing root ribs. The corresponding stop
at the guide rod 8St11 in the cockpit should be placed to allow a free play of
approx. 3 mm (0.12 in.) between the airbrake handle and the stop at the guide
rod with the airbrakes locked over centre.
1.5.4 Free play
Free play in the airbrake control system is of no effect.
The airbrakes themselves at their hinges should not have so much free play that
they hit the wing surface instead of entering into their boxes during retraction
under airloads.