Great Planes RimFire 250 Power System User Manual

Page 2

IMPORTANT PRECAUTIONS

• Once the battery is connected to the ESC, stay clear of the motor

and prop.

• DO NOT apply an input voltage that exceeds the maximum

specifi cation of each motor.

• DO NOT apply currents to the motor that exceed the maximum

specifi cations of each motor.

• DO NOT allow the input connectors to accidentally touch each other

while power is applied to the motor. Make sure all input connections
are insulated electrically.

• DO NOT allow water or moisture to enter the motor, as it can

cause permanent damage to the motor and possibly short out the
attached ESC.

• DO NOT cut the coated wires from the motor. If you must remove the

bullet connectors, unsolder them.

• Allow the motor to cool after each fl ight.

• The motor shaft of the motor will rotate at very high rpm. DO

NOT attempt to touch the shaft while it is rotating. If setting up
the motor/ESC on the workbench, make sure the motor is securely
attached and that nothing is attached to the motor shaft BEFORE
applying power.

• NEVER attempt to use a damaged motor (having mechanical or

electrical defects).

• ElectriFly carries a complete line of Ammo (in-runner style) and

RimFire (out-runner style) brushless motors, gear drives, motor
mounts, prop adapters and speed controls. For a complete list of
these products, check out our web site at:

www.greatplanes.com www.electrifl y.com

or visit your nearest hobby shop that carries the full line of Great
Planes and ElectriFly products.

GPMG4502

The motor can now be mounted from the back side of a fi rewall with only
the shaft protruding forward of the fi rewall. The prop saver adapter or an
optional collet or set screw type adapter can be used to attach the propeller
to the motor.

Collet Type Prop Adapter Installation

Slide the 3mm prop shaft
over the motor shaft. Next
slide the prop shaft retainer
over the prop shaft. Note that
the hole through the retainer
is tapered. Make sure that the
side with the larger diameter
hole is installed fi rst. Install
the prop, prop washer and
then the prop nut. Tighten the
prop nut against the prop. This will cause the tapered hole in the prop shaft
retainer to squeeze the prop shaft around the output shaft. Carefully pull on
the prop to make sure it is securely attached to the motor shaft.

Set Screw Type Prop Adapter Installation

Slide the 3mm prop adapter
over the motor shaft. Tighten
both of the set screws against
the shaft. Install the prop,
prop washer and then the
prop nut. Tighten the prop nut
against the prop. Carefully
pull on the prop to make sure
it is securely attached to the
motor shaft.

INSTALL THE BRUSHLESS ESC

Mount your ESC in the desired location. Always make sure that the ESC is
positioned so that it gets some cooling air fl owing over it.

Use the instructions included with the ESC to correctly connect the ESC.

RIMFIRE MOTOR MAINTENANCE

RimFire brushless motors require virtually no maintenance. There are no
brushes to wear out and replace. The precision bearings have a very long
service life and should last a very long time. The internal parts of the motor
should not require any cleaning. The only thing that needs to be checked is
to make sure all the screws and set screws remain tight.

Optional Reverse Shaft Installation

An optional reversing shaft is available for purchase separately
(GPMG1403) and will allow you to mount the RimFire 250 motor
behind the fi rewall.

Remove the set screw
that secures the motor
shaft to the motor front
case (this requires a
0.9mm allen key which
is not included). With
the set screw removed,
push the motor shaft out
through the bottom of
the motor being careful
not to lose the washer on the shaft. Tip: The shaft is a very tight fi t in
the motor case. An arbor press machine or a drill press (with a small
drill bit inserted upside down in the press) can be used to easily press
the shaft out of the motor.

Carefully remove the
c-clip from the aft end of
the motor shaft. A fi ne,
fl athead screwdriver or
small needle nose pliers
are useful in doing this.
Tip: Crawling around on
your hands and knees
looking for a lost c-clip is
no fun. Wrap a sandwich
bag around the shaft
before attempting to remove the c-clip. If the c-clip fl ies off the shaft,
it will be contained by the bag. Also, be sure to wear safety glasses
when removing the clip!

Reinstall the c-clip into
the groove on the reverse
shaft along with the
washer. Insert the reverse
shaft into the motor case.
The fl at spot on the shaft
near the c-clip groove
must be aligned with the
set screw in the motor
front case. Tighten the
set screw against the fl at
spot on the shaft.

Template

RimFire 250 Accessory and Spare Parts

GPMQ4625

Rimfi re Prop Saver (complete set)

GPMM3111 2mm gold plated bullet connectors - female (3)
GPMM3110 2mm gold plated bullet connectors - male (3
GPMG1401

Rimfi re 250 Replacement Shaft Kit

GPMG1403

Rimfi re 250 Reverse Run Shaft

GPMG1451

Rimfi re 250 Bearings (2)

GPMG1430

C-clip (10) for 3mm Rimfi re Motor Shafts

GPMG1405

Prop Saver O-rings (5)