Great Planes Dirty Birdy .60 ARF - GPMA1975 - Manual (Page 14)

14
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19. Fit the end of the pushrod into the screw lock connector
on the opposite side of the servo as the retract. Repeat steps
15-18 for the other retract. Tighten the set screws in the screw
lock connectors and test the operation of the retracts. The gear
must raise and lower lock to lock. If the gear is not locking in
position, adjust the positions of the pushrods in the connectors.
INSTALL THE OPTIONAL ROBART
PNEUMATIC LANDING GEAR
If you have installed the fi xed or mechanical main gear, skip
this section. Additional hardware is required that is not included
with the Dirty Birdy ARF to install pneumatic retracts. See
the beginning sections of this manual for a detailed list of the
required hardware.
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1. Trim the covering from the main wheel wells on the
underside of the wing. There are small pieces of wood
supporting the covering that must also be removed.
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2. Open the pneumatic retract cases and fl ip the positions
of the valves to the opposite side as shown in the photo.
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3. Cut the retract struts to 5" [127mm] as shown in the
photo using a rotary tool and cutoff wheel. File a small bevel
onto the ends of the struts to ease the installation of the axles.
Loosen the set screws that holds the struts in the retract
assemblies. Rotate the struts so that the coils in the wires are
inline with the rolling direction of the wheels. Tighten the set
screws against the wire in order to make marks on the wires.
Remove the struts completely from the retracts, fi le fl at spots
at the marks from the set screw, and then reinstall the struts
using thread locking compound on the set screws.
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4. Trim the hardwood landing gear mounting rails as
necessary in order to fi t the retract assemblies in place.