Great Planes RV-4 Park Flyer Kit - GPMA0010 - Manual (Page 29)

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3. Mount the landing gear to the fuse with a #14 rubber
band on each side. Both rubber bands must be stretched
enough to wrap around the gear and dowel at least two times.
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4. Cut four 1" [25.4mm] pieces from a leftover 1/8" x 1/8"
[32. x 3.2mm] balsa stick. Glue the pieces in front of and
behind the landing gear as shown in the photo.
Follow these assembly instructions for the Great Planes
ElectriFly motor and S-280 gear drive. If you are using
another type of gear drive and motor, follow the instructions
that came with the unit.
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1. Use denatured alcohol or other solvent to clean the
motor shaft. Roughen the shaft with 320-grit sandpaper so
glue will adhere.
Note: If you are using the Great Planes ElectriFly S-370
motor, you should lightly file the knurling on the motor shaft
to make installation of the pinion gear easier. Wrap the
motor in a plastic bag to prevent metal filings from entering
the motor.
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2. Apply a small amount of the green locking glue to the
motor shaft. Press the pinion gear onto the motor shaft using
a small hammer, base of a large screwdriver or something
similar. Depending on how tight the fit is, you may have to tap
the gear into place. While doing this, do not rest the base of
the motor on your workbench, but support the motor shaft with
a piece of hardwood. This way, the pressure applied to the
gear will not displace the armature in the motor.
Note: If you are using the Great Planes ElectriFly S-370
motor, it is easier to press the gear into place between the
jaws of a vise. Be careful not to damage the capacitors
installed on the back of the motor. Follow the instructions
supplied with the motor.
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3. Press the motor by hand as far as it will go into the
gear drive unit. Draw a pencil line around the motor where it
aligns with the rear of the gear drive unit. Back the motor out
about 1/16" [1.6mm]. Spin the gear drive output shaft with
your fingers to insure that the gear drive and motor move
freely. If the fit of the motor in the gear drive is loose, use a
drop of CA to hold the motor in place.
Note: If you are using the Great Planes ElectriFly S-370 motor
the fit of the motor in the gear drive will be very tight. Carefully
use a slip joint pliers to install the motor in the gear drive.
Assemble the Gear Drive
29