Great Planes Piper J-3 ElectriCub Park Flyer ARF - GPMA1153 - Manual (Page 11)

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2. Attach a screw-lock pushrod connector on the servo arm
that came with the servo. Insert the threaded portion down
through the top of the arm, slide a washer on the bottom of the
threaded portion and tighten to the horn using the small
knurled nut. Be sure to apply a small drop of thread locking
compound to the threaded portion to prevent the nut from
working loose and falling off. Do not overtighten as the
connector must be able to rotate freely. Do this for both servos.
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3. Fit the two servos in the servo tray as shown. Plug the
servos and ESC into your receiver. Turn on the transmitter
and receiver to center the servos. Slide the pushrods
through the screw-lock pushrod connectors, but do not
tighten. Drill 1/16" [1.6mm] pilot holes in the tray where the
servo mounting holes line up. Making sure not to preload the
pushrods, mount the servos to the servo tray with the
hardware provided with your radio. Turn the transmitter and
receiver off. Don’t cut the pushrods yet. This will allow you to
adjust the position of the servo tray for balancing.
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1. Following the motor manufacturer’s instructions, assemble
your motor and gear box. Refer to the “Motor” section on
page 3.
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2. Test fit the motor in the motor mount. The motor should
be as far back as possible, without contacting the firewall.
When satisfied with the fit, secure the motor with the
supplied zip-tie straps.
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1. Cut the 1/2" [13mm] circle from the front of the cowl and
the small square below it as shown using a sharp hobby knife.
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2. Test fit the cowl and trim as necessary.
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3. Attach the cowling to the fuselage with clear tape. We
used clear packing tape to secure the cowling to the fuse.
Note: Two pieces of yellow string are provided to simulate
wing struts. They enhance the appearance of the plane, but
are not necessary. The plane can be flown without the struts.
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1. Through the covering on the bottom of the wing you
should be able to see four small black dots, two on each
side, between the second and third ribs from the wing tips.
Optional: Install the Wing Struts
Install the Cowl
Mount the Motor
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