Great Planes Extra 300SP Performance Series ARF - GPMA1022 User Manual
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4. Loosen the socket head cap screws on the side of the
engine mount and adjust the engine mount until the distance
from the rear of the mount to the prop washer is 5-1/8" [130mm].
Re-tighten the bolts on the side of the engine mount, using
thread locker to secure the mount. Bolt the engine mount to the
front of the airframe using the four 6-32 x 1/2" [13mm] socket
head cap screws, #6 washers, and #6 lock washers provided.
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5. Cut out the perforated portions on the underside of the
fi rewall and mount the ESC using the three #4 x 3/8" [9.5mm]
sheet metal screws and #4 washers, as shown. Remove the
ESC and harden the screw holes with thin CA. Re-mount the
ESC. Remove the prop washer and prop nut from the motor
and connect the motor to the ESC. Check the rotation of
the motor by turning on your transmitter, plugging the ESC
into the receiver, and plugging a LiPo battery into the ESC.
Be careful!! The motor will rotate when the throttle stick
is moved. Stand clear. If the rotation of the motor is not
counter clockwise as viewed from the front of the airplane,
remove any two of the wires that connect the ESC to the
motor and swap them. Verify that the motor rotation is correct.
Disconnect the batteries and receiver. Note: If using the
Great Planes SS-60 ESC you will need to plug a battery into
the receiver, because the Great Planes SS-60 ESC does not
have a Battery Eliminator Circuit (BEC).
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6. Cut the hook and loop material into two 7-1/2" [190mm]
long strips. Overlap the hook and loop material 1" [25.4mm] as
shown to create a battery strap. Using thick CA, glue a small
section of the scrap hook side of the material to the battery
tray. Attach some self adhesive loop material to the underside
of the batteries. This will keep the batteries from sliding.
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7. Thread the two battery straps into the slots in the battery
tray. When you are ready to fl y, use these straps to secure
the battery to the battery tray as shown.
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8. When using an electric motor it is best to mount the
rudder servo in the tray next to the elevator servo. If you do
not wish to mount the servo in the tray, skip ahead to step 5
in the “Installing the Glow Engine” section.