Great Planes RimFire 80mm Power System - Manual

Stock # Voltage Capacity Weight
GPMP0541 11.1V (3S) 3350mAh oz (275g)
GPMP0540 7.4V (2S) 3350mAh oz (188g)
GPMP0542 14.8V (4S) 3350mAh oz (347g)
GPMP0543 18.5V (5S) 3350mAh oz (435g)
GPMP0560 7.4V (2S) 5300mAh oz (291g)
GPMP0561 11.1V (3S) 5300mAh oz (426g)
GPMP0562 14.8V (4S) 5300mAh oz (555g)
GPMP0563 18.5V (5S) 5300mAh oz (697g)
Type
25C LiPo
25C LiPo
25C LiPo
25C LiPo
25C LiPo
25C LiPo
25C LiPo
25C LiPo
9.7
6.6
12.2
15.3
10.3
15.4
19.6
24.6
5
ELECTRONIC SPEED CONTROL (ESC)
The following brushless electronic speed controls are compatible with
these motors.
ElectriFly Silver Series 80A Brushless ESC High-Volt (GPMM1860)
ElectriFly Silver Series 100A Brushless ESC High-Volt (GPMM1870)
Castle Creations Phoenix
110 High-Volt Brushless
ESC (CSEM2018)
Kontronik™ Power Jazz
63V Brushless ESC
120A (KONM3140)
6
DETERMINE WHAT YOU NEED TO BUILD YOUR POWER SYSTEM
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 performance then
multiply 100 x Airplane Weight (lbs)
• If you expect 3D or extreme performance multiply 150 x
Airplane Weight (lbs)
2. The number you get is the minimum wattage you will need for your
plane to perform as you wish.
3. Select a LiPo battery voltage within the recommended range of the
motor. Keep in mind that voltage affects prop size (lower volts
require bigger props). 12S is a good reference point to start at. See
“Sample Power Systems” in this manual.
4. Divide the minimum wattage that you came up with by the voltage
you selected. This will give you the current you should expect.
5. Determine the battery capacity needed based on the current draw of
your system and your desired flight time. Be sure to select batteries
with the proper C-rating that can deliver the current you need.
6. Determine the ESC you need based on the system current draw.
See the ESC section for recommended ESCs.
In addition to this procedure, you can also visit the Great Planes
ElectriFly web site for descriptions of the power systems recommended
for our line of electric and glow airplanes as well as more detailed
explanation on the subject.
RECOMMENDED
SETUP
RimFire
50cc
12S 5300mAh 25C LiPo, 120A ESC,
22r8 glow/gas prop
RimFire
65cc
12S 5300mAh 25C LiPo, 120A ESC,
24r8 glow/gas prop
the current in check. If a higher voltage battery is replaced by a lower volt-
age battery, the size of the propeller can be increased to keep the motor at
its rated current.
Another possibility to fine tune the power system’s performance is to use
another motor with higher kV to increase the current or a lower kV to lower
the current.
2
ACCESSORIES
A
B
C
D
E
F
A Great Planes ® Pro ™ Thread Locking Compound (GPMR6060)
B Standoff Brushless Motor Mount XX-Large (GPMG1275)
C 4mm/6mm Female Bullet Adapter (GPMM3118)
D 6mm/4mm Female Bullet Adapter (GPMM3119)
E 6mm Bullet Connector Male (GPMM3116)
F 6mm Bullet Connector Female (GPMM3117)
3
PROPELLERS
Because of the high torque of this motor and its ability to spin at high rpm,
we recommend against using electric-only propellers. Below is a listing
of a few of the recommended props.
TOPQ5260 22x10 Power Point ™ ZINQ1803 24x10 Pro-Zinger
TOPQ5270 24x10 Power Point ZINQ2014 26x10 Zinger Prop
ZINQ1403 20x10 Pro-Zinger ZINQ2017 26x12 Zinger Prop
ZINQ1603 22x10 Pro-Zinger
4
LI-POLY BATTERIES (LIPO)
Number of Cells
Batteries can be connected in series (S) or in parallel (P). A LiPo battery
is advertised by voltage and capacity where each cell carries 3.7 volts. A
4S LiPo battery would be 4 x 3.7V or 14.8V. The capacity is listed in milli-
amp hours or mAh, so a 5300mAh battery can discharge a maximum of
5300 milliamp-hours or 5.3 amp-hours. Please also be aware of the
battery’s discharge current delivery capability, or C-rating. A 25C,
5300mAh battery will deliver 132.5A of current regardless of voltage.
For the most up-to-date list of LiPo batteries, check out the ElectriFly web
site at: www.electrifly.com
Thanks for purchasing the ElectriFly RimFire ™ 50cc-65cc Brushless
Motor! In order to complete your power system you will need to select
the correct LiPo batteries, propeller, ESC, and motor mount. The
following instruction manual will explain what you will need to
complete your new RimFire power system.
1
MOTOR
87.3mm (50cc)
97.3mm (65cc)
80mm
67mm
10mm
Thread Pitch:
10 r 1.25mm
RimFire 50cc (80-75-230) (GPMG4800)
Motor Output Shaft Size: 10mm
Motor Diameter: 80mm [3.14”]
Motor Can Length: 75mm [3.0”]
Mounting Space Length: 87.3mm [3.44”]
Weight: 1250g [44.1oz]
Input Voltage: 33.3-55.5V (9-15S LiPo)
Max Continuous Current: 110A (at 12S)
Max Continuous Power: 5000W
Max Surge Current: 135A (at 12S)
Max Surge Power: 6500W
Prop Range: 22x8 to 26x10 glow/gas prop
Sport Aircraft Weight: 12.7kg [28lbs] [460oz]
3D Aircraft Weight: 8.17kg [18lbs] [288oz]
RimFire 65cc (80-85-160) (GPMG4805)
Motor Output Shaft Size: 10mm
Motor Diameter: 80mm [3.14”]
Motor Can Length: 85mm [3.35”]
Mounting Space Length: 97.3mm [3.83”]
Weight: 1480g [52.2oz]
Input Voltage: 33.3-55.5V (9-15S LiPo)
Max Continuous Current: 135A (at 12S)
Max Continuous Power: 7500W
Max Surge Current: 150A (at 12S)
Max Surge Power: 8400W
Prop Range: 22x10 to 26x12 glow/gas prop
Sport Aircraft Weight: 19.7kg [42lbs] [665oz]
3D Aircraft Weight: 11.79kg [26lbs] [416oz]
Understanding Motors
kV (rpm/volt): This is a number that gets thrown around quite a bit
when talking electrics and it is important to know what it is. kV is the
number of rpm a motor will spin per each volt applied (rpm/volt)
under no load.
This means that basically a motor that has a kV of 1000 when
connected to a 12V battery will try to spin at 12,000rpm (1000x12)
under no load. Likewise a 3500kV motor will try to spin at 42,000rpm
(3500x12) under no load.
When a propeller is attached to the motor, the motor will try to spin
the prop at the rated kV. Depending on the diameter and pitch of the
propeller (the larger the diameter or higher the pitch, the harder it is
for the motor to spin), the motor’s current draw increases as the load
increases and decreases as the load decreases. There are meters
available from your hobby dealer that measure current and voltage.
Because every motor has a maximum current it can take based on its
design and cooling ability, the maximum size of propeller that can be
used with each motor can be determined. Use a propeller that’s too
large and the motor will spin at a much lower rpm than its rated kV,
causing it to draw a lot of current and overheat. If the propeller/fan is
too small, it will require little effort (current) to turn the prop at the
rated kV.
Ideally the motor should be matched with a propeller that causes
the motor to draw 80-100% of its rated maximum constant
current. Once a power system is set up, it can be fine-tuned by
adjusting the propeller size and measuring the amount of current
the motor is drawing.
Please note that the kV of a motor does not change with voltage, but
if a higher voltage is applied to the motor, it will try to spin the same
propeller at a higher rpm. This will cause the motor to draw more
current and possibly exceed the maximum rated current of the motor.
So, if a battery with lower voltage is replaced with one with a higher
voltage, it is recommended that a smaller propeller be used to keep
50CC-65CC BRUSHLESS
OUTRUNNER MOTOR
Items not shown
actual size.