Great Planes GPMG5150, GPMG5185 User Manual
Congratulations, you have just purchased the
Ammo 24mm 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 24mm power system are: Ammo
24mm motor, 24mm small gear drive, small
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 24mm PO
AMMO 24mm PO
WER SYSTEM
WER SYSTEM
by Great Planes
®
Model Stock #
24-33-2500...............GPMG5150
24-33-3180...............GPMG5155
24-33-3500...............GPMG5160
24-33-4040...............GPMG5165
24-33-4875...............GPMG5170
24-45-2350...............GPMG5175
24-45-2900...............GPMG5180
24-45-3790...............GPMG5185
The Ammo motors are labeled to provide the
most information at a glance.For example, the
24-45-2350kV is 24mm in diameter, 45mm
long and has a kV (rpm-per-volt) of 2350 rpm.
Motor Output Shaft
Diameter x Length: 3x11.7mm [0.12" x 0.48"]
Weight (33mm): 67g [2.4oz.]
Weight (45mm): 101g [3.6oz.]
MOTORS
The ElectriFly Brushless Small Motor Mount
combines ease of installation with the
adjustability to fit most motor applications.
1. Front Plate (1)
2. Back Plate (1)
3. 4-40x1/4" SHC Screw (8)
4. #4 Flat Washer (8)
Not Shown:
5. 3x8mm SHC Screw (4)
6. 3mm Flat Washer (4)
BRUSHLESS SMALL MOTOR MOUNT
™
™
OR 45mm
33mm
24mm
19mm
16mm
11.7mm
3mm
MOUNTING
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 24mm
Small Gear Drive (GPMG0505) with several
pinions that allow for the following gear ratios:
Low Ratio > 5:1,4.5:1, 4.3:1, 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 24mm Small Gear Drive is designed to fit
the Great Planes Small Motor Mount
(GPMG1250).
GEARBOX
1. Aluminum Front Plate (1)
2. Aluminum Back Plate (1)
3. 2.5x17mm FH Mach Screw (2)
4. 5.5x11mm Alum Spacer (4)
5. 40 T ooth Spur Gear (1)
6. 50 T ooth 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 Prop Adapter (1)
12. 3x6mm Machine Screw (4)
There is a wide selection of propellers
available for electric use. The 24mm 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 24mm Small Gear Drive uses a 4mm
prop adapter. If you will be using the Ammo
24mm Motor without a gear drive, it requires a
3mm prop adapter (GPMQ4959).
PROPELLER ADAPTERS
GPMQ4930 3mm Set Screw Type
GPMQ4936 4mm Set Screw Type
APCQ4103.............7x5 Electric
APCQ4110.............8x4 Electric
APCQ4115.............8x6 Electric
APCQ4119.............9x7.5 Electric
APCQ4120...........10x5 Electric
APCQ4123...........10x7 Electric
APCQ4128...........11x7 Electric
APCQ4130...........12x6 Electric
APCQ4133...........12x8 Electric
APCQ4136...........12x10 Electric
APCQ3065...........13x6.5 Electric
GPMQ4959 3mm Collet Type
GPMQ4965 4mm Collet Type
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