Hangar 9 P-47D Thunderbolt 20cc Instruction Manual page 19

79. Fit the retract frame to the wing. Guide the servo
extension through the wing, exiting the same location as
the fl ap and aileron servo leads.
 Make sure to mark each servo lead so they can be
identified easily when connection them to the receiver.
80. Secure the retract in the wing using the hardware
included with the retract.
 Always use threadlock on metal-to-metal fasteners.
 It may be necessary to use the spacers included
with the retracts to make sure there is no torsional stress
on retract frame when tightened into position. Torsional
stress can cause intermittent operation of the retract unit.
81. Use a fl at fi le to make a 1/4 inch (6mm) wide fl at area on
the retract axle.
82. Slide the axle into the wheel. Make sure the wheel
rotates freely on the axle. If not, use a hobby knife with
a #11 blade or 5mm drill bit to remove any fl ashing that
may be interfering with the rotation of the wheel on the
axle.
83. Place a nylon spacer on the axle.
P-47D Thunderbolt 20cc
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84. Slide the axle into the retract strut. Tighten the setscrew
to secure the axle to the strut. Make sure the wheel can
rotate freely on the axle.
 Always use threadlock on metal-to-metal fasteners.
85. Check the operation of the retract using the radio system.
The wheel must be centered in the opening. If not, loosen
the mounting screws and adjust as necessary.
 Spacers have been included with the retracts.
Use these to adjust the positioning of the retract
to allow the wheel to retract without interfering
with the wheel well. Once adjusted, check that
there is no torsional stress on retract frame.
86. Attach the landing gear doors to the gear door mounts
using the hardware included with the retracts. The
mounts should be easily moved so the gear door can be
positioned in the following step.
87. Use the radio system to cycle the retracts. Position the
gear doors so they align with the recess in the wing.
It may be necessary to cycle the gear a few times to
correctly position the gear doors. Make sure there is no
binding during the operation of the retract, which could
cause it to stop during its operation. Tighten all the
hardware to complete the retract installation.
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