Mount The Engine - GREAT PLANES Reactor ARF .61-.91 SPORT BIPLANE Instruction Manual

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7. Glue together the plywood ESC mount and glue the
plywood screw doublers to the bottom of the mount. Mount
the ESC to the mount with three #4 x 1/2" [12.7mm] screws
and #4 fl at washers.
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8. Securely glue the ESC mount to the fi rewall. Connect
the motor wires to the motor.
IMPORTANT: Before connecting your batteries to power
up the motor in the following step, be certain NOT to have
a propeller mounted to the motor and read the Battery
Precautions on page 28.
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9. Temporarily connect your receiver, on/off switch,
receiver battery and motor batteries so you can power the
motor to make sure it is hooked up correctly. Turn on the radio
and use the throttle stick on your transmitter to make sure
the motor turns in the correct direction (counter-clockwise
when viewed from the front). If the motor does not turn the
correct direction, switch any two motor and ESC wires with
each other to reverse the direction. Use nylon tie wraps or
electrical tape to secure all the wires and make certain they
will not rub on the motor or motor shaft.

Mount the Engine

(A 4-stroke is shown in the photos, but the procedure for
a 2-stroke is the same.)
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1. Temporarily mount the included Great Planes .60-1.20
adjustable motor mount to the fi rewall with four 8-32 x 1"
[25.4mm] SHCS and #8 fl at washers and lock washers, but
don't tighten the bolts all the way yet.
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2. Place your engine on the mount and adjust the spacing
to fi t the engine. Now tighten the bolts. Use a small clamp to
hold the engine to the mount so the front of the drive washer
(or the back plate of your spinner) will be 5-5/8" [143mm]
from the fi rewall.
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3. Use a Great Planes Dead-Center Hole Locator or
another method to mark the locations of the engine mounting
bolts onto the engine mount.
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4. For perfection, if you have access to a drill press,
remove the mount halves and drill #29 (.135" [3.4mm]) holes
at the marks. If a drill press is not available, the holes may be
drilled while the mount is fastened to the fi rewall.
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5. Use an 8-32 tap to cut threads into the holes—this is
easily and quickly done holding the mount halves in your
hand with your tap chucked in a hand drill at low speed.
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