Great Planes RimFire 50mm Power System - Manual

6
LIPO BATTERIES
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 4x 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
Stock # Voltage Capacity Weight # of Cells Discharge
GPMP0519 7.4V 2200mAh 4.4oz (125g) 2 25C
GPMP0520 11.1V 2200mAh 6.3oz (179g) 3 25C
GPMP0521 14.8V 2200mAh 8.2oz (233g) 4 25C
GPMP0540 7.4V 3350mAh 6.6oz (188g) 2 25C
GPMP0541 11.1V 3350mAh 9.7oz (275g) 3 25C
GPMP0542 14.8V 3350mAh 12.2oz (347g) 4 25C
GPMP0543 18.5V 3350mAh 15.3oz (435g) 5 25C
GPMP0560 7.4V 5300mAh 10.3oz (291g) 2 25C
GPMP0561 11.1V 5300mAh 15.4oz (436g) 3 25C
GPMP0562 14.8V 5300mAh 19.6oz (555g) 4 25C
GPMP0563 18.5V 5300mAh 24.6oz (698g) 5 25C
7
REPLACEMENT PARTS
GPMM3114 4mm Gold Plated Bullet Connectors - Male (3)
GPMM3115 4mm Gold Plated Bullet Connectors - Female (3)
GPMQ4909 RimFire Prop Adapter for 50mm Motors
GPMG1205 RimFire Backplate Motor Mount for 50-63mm Motors
GPMG1436 C-clip (10) for 8mm RimFire Motor Shafts
GPMG1458 Bearings (3) for RimFire 50-xx-xx Motors
GPMG1418 Replacement Shaft Kit for RimFire 50-55-xx Motors
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 pos-
sibly 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 recom-
mended that a smaller propeller be used to keep the current in check. If a
higher voltage battery is replaced by a lower voltage 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
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. ElectriFly offers the Silver Series SS-60 and SS-80
Brushless ESCs (GPMM1850 and GPMM1860) that work well with the
RimFire 50mm motors.
The SS-60 ESC comes with 4mm female bullet connectors that plug directly
into the 4mm male connectors installed on the RimFire 50mm motors, so
no soldering is required. The SS-80 comes with 6mm female bullet
connectors and requires an adapter (GPMM3119). Also, these ESCs come
with a Deans
® Ultra Plug ® battery connector that matches the connectors
that are found on most batteries that it will use.
3
BRUSHLESS LARGE MOTOR MOUNT
1. Front Plate (1) 5. #6 Flat Washer (8)
2. Back Plate (1) 6. Motor Bracket (1, not used)
3. Screw Plate (4) 7. 6-32 Lock Nut (2, not used)
4. 6-32x1/2” SHC Screw (8)
The ElectriFly Brushless Large Motor Mount combines ease of installation
with the adjustability to fit most motor applications. The Large Motor
Mount is designed to fit the bolt pattern of the Great Planes
® .40-.70 and
.60-1.20 Nylon Engine Mount. This easily allows the conversion of a glow
powered plane to electric powered.
4
PROPELLERS
There is a wide selection of propellers available for electric use. The RimFire
50mm motors use high performance electric props such as the APC
E-series props. The larger the propeller used, the more current your motor
will draw. The smaller the propeller, the less current the motor will draw.
Shown are a few of the recommended electric props. Due to the large
range of propellers and the constant addition of new sizes, visit our web
sites at www.electrifly.com and www.greatplanes.com for the most
up-to-date listing of electric type props.
APCQ1055 11x5.5 Electric
APCQ4129 11x8 Electric
APCQ4130 12X6 Electric
APCQ4133 12x8 Electric
APCQ3065 13x6.5 Electric
APCQ3080 13x8 Electric APCQ4145 14x7 Electric
APCQ4013 15x8 Electric
APCQ1606 16x6 Glow
APCQ4018 17x8 Electric
APCQ4024 19x8 Electric
5
PROPELLER ADAPTERS
The RimFire 50mm motor comes with a prop adapter that mounts directly
to the motor case. If the RimFire 50mm motor needs to be mounted so
that the prop is mounted on the motor shaft, the motor requires an 8mm
prop adapter collet type (GPMQ4971) or set screw type (GPMQ4945).
GPMQ4971 8mm Collet Type
GPMQ4945 8mm Set Screw Type
Congratulations, you have just purchased one of the RimFire 50mm
power system components. All the components are sold separately to
allow you to customize your power system to your airplane. The
components needed to assemble your complete RimFire 50mm
power system are: RimFire 50mm motor, propeller, propeller adapter
and brushless speed control. This instruction sheet explains how to
determine what you will need and how to assemble each component.
1
MOTOR
8mm 50mm
24mm
3mm
Mounting
Screw
24mm
19mm
55mm OR 65mm
The RimFire motors are labeled to provide the most information at a
glance. For example: the RimFire .60 (50-55-650) is 50mm in
diameter, 55mm long and has a kV (rpm-per-volt) of 650.
RimFire .60 (50-55-650) (GPMG4745)
Motor Output Shaft Diameter and Length: 8x19mm [0.32"x0.76"]
Weight: 298g [10.5oz]
Input Voltage: 18.5 – 22.2V
Max Surge Current: 85A
Max Surge Power: 2200W
RimFire .80 (50-55-500) (GPMG4740)
Motor Output Shaft Diameter and Length: 8x19mm [0.32"x0.76"]
Weight: 298g [10.5oz]
Input Voltage: 18.5 – 22.2V
Max Surge Current: 65A
Max Surge Power: 2200W
RimFire 1.20 (50-55-450) (GPMG4770)
Motor Output Shaft Diameter and Length: 8x19mm [0.32"x0.76"]
Weight: 400g [14.1oz]
Input Voltage: 18.5 – 22.2V
Max Surge Current: 85A
Max Surge Power: 2300W
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 a motor with 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
to spin), the motor’s current draw can be increased or decreased.
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. If the propeller is too large,
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.
50MM BRUSHLESS
OUTRUNNER MOTOR