Great Planes RimFire 200 18-06-2400 Outrunner Brushless - GPMG4455 - Manual

Procedure #2: If you know the approximate weight of your
airplane, including the motor and battery, and the performance
you want from it, answer the questions below to determine the
correct power system for your plane. You may need to make
more than one calculation using different motors and battery
combinations. See the battery section for some of the battery
weights for the suggested batteries.
❏ 1. Perform the following calculation to determine the wattage
required:
• If you expect trainer-like performance then multiply
75 x Airplane Weight (lbs).
• If you expect aerobatic or high speed-like
performance then multiply 100 x Airplane
Weight (lbs).
• If you expect 3D or extreme performance multiply
150 x Airplane Weight (lbs).
Note: To convert grams to lbs, divide by 454. To convert ounces
to lbs, divide by 28.
❏ 2. The number you get is the minimum wattage you will need
for your plane to perform as you wish. Watts = current (A) ×
voltage (V). Using suggested power system combinations
for reference, determine what combination gives you the
performance you want based on wattage and maximum
propeller size that will fi t on the plane.
❏ 3. Note the recommended battery voltage.
❏ 4. Determine the battery capacity needed based on the
current draw of your system and your desired fl ight time.
❏ 5. Determine the ESC you need based on the system current
draw. In addition to these two procedures, you can also
visit the Great Planes ElectriFly web site for descriptions
of the power systems recommended for our line of
electric airplanes as well as more detailed explanation
on the subject.
Essentially when using this rule, the maximum weight of
your model (fully equipped w/ battery, radio, etc.) should
be as follows when using this motor.
Trainer 7.7oz [219g]
Sport 5.8oz [165g]
3D 3.9oz [110g]
To help you plan your power system requirements for your
project, use the following table to come up with a total weight.
Keep in mind that weight is critical in this size range.
RimFire 200
Prop
Battery
Servos
Receiver
ESC
Airframe
Total Weight
12.4 grams
WEIGHT
T
ABLE
3
BATTERIES
Cells can be connected in series or in parallel. Usually batteries are
labeled by their number of cells, such as a 2-cell LiPo. This means
the cells are connected in SERIES (S). Arranging batteries in series
gives you more power (higher voltage).
• Each LiPo battery has 3.7V, so a 2-cell LiPo
battery has 3.7 x 2 = 7.4V
When selecting batteries, please consider weight. Because of this,
we recommend the following batteries:
Great Planes ® ElectriFly
300mAh 7.4V 2S 20C LiPo
(GPMP0700)
Weight = 0.7oz [19.6g]
FlightPower EON-X Lite ™
350mAh 7.4V 2S 25C LiPo
(FPWP4014)
Weight = 0.8oz [23g]
Due to the constantly changing battery technology, check out the
ElectriFly web site at www.electrifl y.com for the most up-to-date
listing of the ElectriFly battery line.
4
PROPELLER
For any given voltage, an electric motor’s load is determined by
the propeller chosen. A propeller that is too small will not take
advantage of the power that the motor can produce. A propeller
that is too large will cause current draw to exceed the maximum
allowed continuous current. This can catastrophically damage the
motor and/or ESC.
The fi rst number in a propeller designation is the diameter in inches.
The second number refers to the theoretic pitch in inches traveled
for one complete rotation of the prop. So, a 6x3 propeller measures
6" [152mm] in diameter and travels 3" [76mm] forward for one
complete revolution (360°). Generally, when sizing up a prop, going
up in diameter gains more thrust (immediate punch-out power).
Going up in pitch results in a higher top speed.
For the RimFire 200 we recommend the following propellers.
Best all-around performance
GWS 7x3.5 Propeller (GWSQ2008), 4.9A @ 7.4V, 8760rpm
Sport performance
GWS 6x3 Propeller (GWSQ2007), 4.0A @ 7.4V, 10620rpm
5
DETERMINE WHAT YOU NEED to BUILD YOUR POWER SYSTEM
Now that you have one component for your power system, there
are several different ways to select the rest. In time, experience will
help you to determine what works best for you, but an easy way to
determine what you need now is the following.
Procedure #1: If you know the size of the propeller you want to
turn and the rpm, then:
❏ 1. Find the combination that delivers the closest performance to what
you want (refer to the ElectriFly web site for typical combinations),
or refer to the airplane manufacturer’s recommendations.
❏ 2. Note the recommended battery voltage.
❏ 3. Determine the battery capacity needed based on the current
draw of your system and your desired fl ight time.
❏ 4. Determine the ESC you need based on the system current
draw. See the ESC section.
Thank you for purchasing the RimFire 200 brushless outrunner
motor! You’ll be pleased with the performance of this micro
motor. We’ve carefully designed this motor to give you the
best performance while using the most popular propellers and
batteries. To get the most out of your RimFire 200, please use
only a 7.4V (2S) LiPo battery. The following instructions will
help you mount your motor and select the right components
to complete your power system.
1
MOTOR SPECIFICATION
Model Stock #
RimFire 200 (18-19-2400) GPMG4455
The RimFire motors are labeled to provide the most information
at a glance. For example: the RimFire 200 (18-19-2400) is
18mm in diameter, 19mm long, and has a kV (rpm-per-1volt)
of 2400 rpm.
19 mm
18 mm
Connectors 3-pin micro
Max. Constant Current 4.9 A
Max. Surge Current 6.3 A
Max. Constant Watts 36 W
Burst Watts 47 W
No Load Current 0.35A
Input Voltage 7.4V (2S LiPo)
Weight
0.38 oz (10.7g) 0.44 oz (12.4g)
motor
only
motor, mount,
& prop adapter
Motor
Diameter
0.71 in
(18 mm)
Overall
Length
0.74 in
(18.8 mm)
Shaft
Diameter
0.079 in
(2.0 mm)
Shaft
Length
0.20 in
(5 mm)
Lead
Length
1.57 in
(40 mm)
2
ELECTRONIC SPEED CONTROL (ESC)
An ESC is basically the device that controls your motor through
your radio system. Never run any RimFire motors with a brushed
ESC. It will not work and you may damage both the motor and
the ESC. Always use a brushless ESC. When choosing an ESC,
choose one that is rated to handle at least the maximum current
your power system will draw during full-throttle operation.
ElectriFly offers Brushless ESCs that will work with the RimFire
200 motor.
For the RimFire 200 we recommend this high quality,
lightweight ESC:
FlightPower ®
6A Brushless ESC w/BEC
(FPWM0206)
Weight = 0.20oz [5.7g]
200 POWER
SYSTEM