Great Planes Ammo 24mm Power System - GPMG5150-5185 - 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 instruction 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.
24mm
33 mm OR 45mm
11.7mm 19mm
16mm
3 mm
MOUNTING
SCREW
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 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 excessive current and overheat.
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 S mall Gear Drive is designed to fit
the Great Planes Small Motor Mount
(GPMG1250).
GEARBOX
The ElectriFly Brushless S mall 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"
S HC S crew (8)
4. #4 Flat Washer (8)
Not Shown:
5. 3x8mm S HC S crew (4)
6. 3mm Flat Washer (4)
BRUSHLESS SMALL MOTOR MOUNT
An E S C is basically the device that controls
your motor through your radio system. Never
run any Ammo motors with a brushed E
S C. It
will not work and you may damage both the
motor and the E
S C. Always use a brushless
E S C. ElectriFly offers Brushless E S Cs that will
work with the Ammo 24mm motors.
ELECTRONIC SPEED CONTROL (ESC)
1. Aluminum Front Plate (1)
2. Aluminum Back Plate (1)
3. 2.5x17mm FH Mach
S crew (2)
4. 5.5x11mm Alum S pacer (4)
5. 40 Tooth S pur Gear (1)
6. 50 Tooth S pur Gear (1)
7. 3x20mm S HC S crew (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
S crew (4)
The Ammo Motor/ S ilver S eries E S C combination
can use NiMH or LiPo batteries. Typically, NiMH
batteries are heavier but much cheaper for the
same capacity as LiPo batteries. If you want a
very light, high-performance airplane, you might
want to use LiPo batteries, but if weight is not a
concern, then NiMH batteries might be for you.
BATTERIES: CHEMISTRY
Cells can be connected in series or in parallel.
Usually batteries are labeled as 8-cell NiMH or
3-cell LiPo.This means the cells are connected in
S ERIE S ( S ). Arranging batteries in series gives
you more power (higher voltage).
• Each NiMH cell has 1.2V, so an 8-cell
NiMH battery has 1.2x8 = 9.6V
• Each LiPo battery has 3.7V, so a 3-cell
LiPo battery has 3.7x3 = 11.1V
If you need a higher voltage than what is
available in the LiPo battery line, you will need
to connect two battery packs together in series.
If you need a battery voltage of 14.8V you can
use the series Y-connector (GPMP3143) to
connect two 7.4V batteries together.
If a battery is arranged in PARALLEL it might be
labeled as (P). Arranging the batteries in parallel
will give you more duration (more capacity).
BATTERIES: NUMBER OF CELLS
There is a wide selection of propellers
available for electric use. The 24mm motors
use high performance electric props such as
the APC E-
S eries props. The larger the
propeller used, the more current your motor
will draw. The smaller the propeller, the less
current the motor will draw.
S hown 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.
PROPELLERS
The 24mm S mall 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 S et S crew Type
GPMQ4936 4mm S et S crew 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
Battery # of
Stock # Voltage Capacity Weight Type Cells
GPMP0604 7.4V 910mAh 2.0oz (58g) LiPo 2
GPMP0605 11.1V 910mAh 3.0oz (85g) LiPo 3
GPMP0608 7.4V 1250mAh 2.6oz (74g) LiPo 2
GPMP0609 11.1V 1250mAh 3.9oz (110g) LiPo 3
GPMP0830 7.4V 1500mAh 2.6oz (73g) LiPo 2
GPMP0831 11.1V 1500mAh 3.8oz (107g) LiPo 3
GPMP0616 7.4V 2100mAh 4.3oz (121g) LiPo 2
GPMP0617 11.1V 2100mAh 6.4oz (181g) LiPo 3
GPMP0250 8.4V 1100mAh 5.6oz (160g) NiMH 7
GPMP0251 9.6V 1100mAh 6.3oz (180g) NiMH 8
GPMP0253 12.0V 1100mAh 7.9oz (225g) NiMH 10
ElectriFly offers a full line of NiMH and LiPo
batteries. Airplanes that use the Ammo 24mm
motors will typically use batteries with a capacity
of 910 to 2100mAh, with the higher capacity
batteries delivering more flying time but also
being heavier. Most of the batteries have
connectors that fit the recommended E
S C.
Due to the constantly changing battery
technology, check out the ElectriFly web site at
www.electrifly.com for the most up-to-date
listing of the ElectriFly battery line.
GPMQ4959 3mm Collet Type
GPMQ4965 4mm Collet Type
ElectriFly Silver Series 25 ( SS -25) E S C
(GPMM1820)
for 25A maximum constant current draw.
This E S C comes with 3.5mm female bullet
connectors that plug directly into the 3.5mm
male connectors installed on the Ammo 24mm
motors, so no soldering is required. Also, this
E
S C comes with a Deans ® Ultra battery
connector that matches the connectors that are
found on most batteries that it will use.
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