18
BUILD THE FUSELAGE
BRUSHLESS MOTOR INSTALLATION
The Razor 3D ARF is designed to be fl own with a .46-.55
two-stroke glow engine, .52-.81 four-stroke glow engine, or a
brushless out-runner motor. If you have installed a glow engine,
skip this section as it only contains information relevant to
installing a brushless motor.
Be sure to read and understand the instructions that come with
the ESC and motor before attempting to operate the system.
Also read the lithium battery handling and usage warning on
page 28 of this manual.
❏
1. Cut the perforations on the cooling hole cutout in the
fi rewall and remove the piece.
❏
2. Attach the out-runner motor to the brushless motor mount
using the included 3 x 8mm machine screws and thread locking
compound. If you haven’t done so yet, install the prop adapter
to the motor case with the hardware included with the motor
and thread locking compound.
❏
3. Attach the motor mount to the fi rewall using four 6-32 x
3/4" [19mm] machine screws, four #6 fl at washers, four #6 lock
washers, and thread locking compound.
❏
4. Loosen the screws that join the aluminum motor mount
halves and slide them together so that the front of the prop
adapter is 4-7/8" [124mm] from the fi rewall. When adjusting
the aluminum motor mount, take care not to inadvertently
increase or decrease the amount of down thrust from what is
already built into the motor mounting box.
❏
5. Locate the plywood
ESC tray
parts. Glue the three disks
over the ESC mounting holes on the tray as shown.
