Great Planes GPMG5190, GPMG5235 User Manual
Congratulations, you have just purchased the
Ammo 28mm 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 Ammo 28mm power system are: Ammo
28mm motor, 28mm Medium Gear Drive, 28mm
Motor Mount, propeller, propeller adapter and
brushless speed control. This instr uction sheet
explains how to determine what you will need
and how to assemble each component.
AMMO 28mm PO
AMMO 28mm PO
WER SYSTEM
WER SYSTEM
by Great Planes
®
Model Stock #
28-35-2200...............GPMG5190
28-35-2700...............GPMG5195
28-35-3900...............GPMG5200
28-35-5100...............GPMG5205
28-45-2100...............GPMG5210
28-45-2700...............GPMG5215
28-45-3600...............GPMG5220
28-56-1530...............GPMG5225
28-56-2300...............GPMG5230
28-56-3200...............GPMG5235
The Ammo motors are labeled to provide the
most information at a glance.For example:the
28-45-2700kV is 28mm in diameter, 45mm
long and has a kV (rpm-per-volt) of 2700 rpm.
Motor Output Shaft
Diameter x Length: 3.2x15mm [.125" x .56"]
Weight (35mm): 93g [3.3oz.]
Weight (45mm): 133g [4.6oz.]
Weight (56mm): 166g [5.9oz.]
MOTORS
The ElectriFly Brushless Medium Motor
Mount combines the ease of installation with
the adjustability to fit most motor applications.
The Medium Motor Mount is designed to fit
the bolt pattern of the Great Planes .20-.48
and .40-.70 Nylon Engine Mount. This easily
allows the conversion of a glow powered
plane to electric powered.
1. Front Plate (1)
2. Back Plate (1)
3. 4-40x1/4" SHC Screw (8)
4. #4 Flat Washer (10)
5. Motor Bracket (1)
6. 4-40x1/2" SHC Screw (2)
7. 4-40 Lock Nut (2)
BRUSHLESS MEDIUM MOTOR MOUNT
™
™
35mm, 45mm
27.5mm
16mm
19mm
OR 56mm
3.175mm
15mm
3mm
MOUNT
SCREW
The ElectriFly Ammo motors have high kVs
meaning that they like to run at very high rpm.
A gear drive is used in order to reduce the rpm
allowing a larger, more efficient propeller to be
used. Great Planes ElectriFly offers a 28mm
Medium Gear Drive (GPMG0510) with several
pinions that allow for the following gear ratios:
Low Ratio> 5:1,4.5:1, 4.2:1, 4:1, 3.6:1, 3.3:1,
3.1:1, 2.8:1, 2.5:1, 2.2:1, 2:1 <High Ratio.
If you use a prop that is too small with a gear
ratio that is too low, the motor will draw very
little current and the prop will turn at too low of
an rpm to produce any usable power. The
higher the gear ratio, the smaller the prop will
need to be and the higher the rpm will be. If the
gear ratio is too high for the prop used, the
motor will draw excessiv e current and ov erheat.
The included chart, on the inside of the header
card, shows the motor/prop/gear ratios that
have been tested and found to work well.
The 28mm Medium Gear Drive is designed to
fit the Great Planes 28mm Motor Mount
(GPMG1255).
GEARBOX
1. Aluminum Front Plate (1)
2. Aluminum Back Plate (1)
3. 2.5x17mm FH Machine Screw (2)
4. 5.5x11mm Aluminum Spacer (4)
5. 40 Tooth Spur Gear (1)
6. 50 Tooth Spur Gear (1)
7. 3x20mm SHC Screw (2)
8. 3mm Flat Washer (2)
9. 11 Tooth Pinion Gear (1)
10. 16 Tooth Pinion Gear (1)
11. 4mm Collet Type Prop Adapter (1)
12. 3x6mm Machine Screw (4)
There is a wide selection of propellers
available for electric use. The 28mm Ammo
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-todate listing of electric type props.
PROPELLERS
The 28mm Medium Gear Drive uses a 5mm
prop adapter. If you will be using the Ammo
28mm Ammo Motor without a gear drive, it
requires a 3.17mm Prop Adapter.
PROPELLER ADAPTERS
GPMQ4933 3.175mm Set Screw T ype
GPMQ4939 5mm Set Screw Type
APCQ4115.............8x6 Electric
APCQ4118.............9x6 Electric
APCQ4119.............9x7.5 Electric
APCQ4120...........10x5 Electric
APCQ4123...........10x7 Electric
APCQ4128...........11x7 Electric
APCQ4129...........11x8 Electric
APCQ4133...........12x8 Electric
APCQ4136...........12x10 Electric
APCQ3065...........13x6.5 Electric
APCQ3080...........13x8 Electric
APCQ4140...........13x10 Electric
APCQ4145...........14x7 Electric
APCQ1409...........14x10 Electric
APCQ4013...........15x8 Electric
APCQ4014...........15x10 Electric
APCQ4015...........16x8 Electric
APCQ4018...........17x8 Electric
APCQ4019...........17x10 Electric
GPMQ4962 3.175mm Collet Type
GPMQ4966 5mm Collet Type
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