Assemble The Wings; Install The Servos - GREAT PLANES SYNCRO Instruction Manual

ASSEMBLE THE WINGS

After the spar covers are permanently glued into place,
the ends of the Y-connector for the aileron servos will no
longer be accessible. The servos may still be removed by
pulling the wires out of the wing, but the wing will no longer
be functional because it will not be possible to re-connect
new servos. So make sure your servos are working properly
before permanently gluing in the spar covers because
there's no going back.

Install the Servos

Refer to this photo for the next two steps.
❏
1. If assembling the glider wing, connect the two servos
you will be using for the ailerons to the longer Y-connector. If
assembling the sport wing, connect the aileron servos to the
shorter Y-connector. Connect the ESC to the throttle channel
in the receiver (channel 3 for Futaba) and the Y-connector to
the aileron channel (channel 1). (If using the ElectriFly SS-
25 ESC, note that the brown wire is the negative lead.)
Longer, 3-hole arms
90°
❏
2. Turn on your transmitter and center the trims. Connect
the motor battery to the ESC to power the servos. Use servo
arms with holes that are approximately 5/16" [8mm] from
center (which are the arms included and shown for the
Futaba servos recommended). Position the arms on the
servos so they will be 90°, or as close to 90° as possible to
the sides of the servo.
90°
5/16" [8mm]
Cut off the unused arms
❏
3. Use small wire cutters to cut off the unused arms so
you have two, opposing servo arms. Fasten the arms to the
servos with the servo arm screws that came with your servos.
❏
4. Disconnect the servos from the Y-connectors. Test-
fi t, then glue the servos into the wings as illustrated for the
wing you are working on: It is recommended to use canopy
glue because the servos will be easier to remove later if ever
necessary (for transferring to another model). Hint: You can
skip ahead to step 1 on page 12 and glue in the elevator and
rudder servos too. Then, you won't have to wait for the glue to
dry when you get to that part of assembly.
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