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High performance electric motors
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Congratulations! Thank you for choosing a product of Model Motors Ltd. Our brushless motors
with neodymium magnets and a rotating case are manufactured using the latest technology
from the highest quality materials. A hardened steel drive shaft mounted in three ball
bearings, and overall robust but lightweight constructions ensure long motor life. The unique
design of the motor gives extremely high torque allowing the use of large diameter and high
pitch propellers without the need for a gearbox. To enjoy trouble-free operation of your new
motor, please take time to read through these instructions.
Specification
AXI2830/10
Voltage range
3 - 4 Li-Poly
RPM per Volt
790 RPM/V
Max. Efficiency
84%
Max. Efficiency
25-37 A (<75%)
Current
No load current
2,8 A
Max. Loading
60 A / 60 s
Internal resistance
44 m
Dimensions
35 x 70.5 mm
Shaft Diameter
5 mm
Weight
232 g
Recomended
2800 – 3200 g
model weight
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AXI2830/12
AXI2835/10
3 - 4 Li-Poly
3 - 5 Li-Poly
670 RPM/V
690 RPM/V
85%
85%
20-30 A (<76%)
15-26 A (<75%)
2,5 A
2,8 A
48 A / 60 s
69 A / 60 s
64 m
46 m
35 x 70.5 mm
35 x 75.5 mm
5 mm
5 mm
232 g
257 g
2800 – 3200 g
3000 – 3500 g
The full weight range is applicable for electric gliders. Keep aerobatic and scale models
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requiring higher power to weight ratios in the lower half of the weight range. We strongly
recommended the use of folding propellers with this type of motor.
More information about recommended propellers can find on our website
Recommended speed controllers:
JETI SPIN 66 Pro OPTO, 3 – 4 cells w/o BEC and max. load 55A
Motor Installation
The motor must be mounted on a rigid mounting with four (or eight) M4 bolts screwed into the
front plate. The screws should extend at least 4 mm into the front plate, but not more than 6
mm (there is a risk of the motor winding damage). The mounting should have holes
corresponding to the holes in the front plate to allow proper cooling of your motor. Please
AXI2835/12
note: the case of the motor rotates! Beware of unsecured wires, parts or RC flight equipment
3 - 5 Li-Poly
etc. It is a good idea to fit a special former separating the motor "from the rest of world".
600 RPM/V
The AXI motor design with its rotating case significantly increases the need of a robust motor
86%
mount. We strongly recommend the use of a folding propeller even with aerobatic models,
even the world F5A champion uses a folding propeller on his motor of a similar design. If you
15-25 A (<78%)
are using your motor at the upper end of it's power range, or if you must use a fixed propeller,
2,3 A
please make sure that your motor really is securely mounted.
45
A / 60 s
66 m
Direction of Rotation and Motor Timing:
35 x 75.5 mm
To change the direction of rotation, simply switch over the connection of the outer two cables
5 mm
between the motor and speed controller, but leave the centre cable connection untouched.
257 g
The optimum motor timing is set by the speed controller, however, some high-end
3000 – 3500 g
programmable speed controllers allow for some adjustment of the motor timing.
Running-in:
There are no brushes or other moving parts to bed in, so no running-in is required.
Cooling:
Please note that your AXI is a high performance electric motor working under high current
loading which produces some heat. Proper cooling is essential in just that same way as it is
with an internal combustion engine. Overheating of your motor causes increased wear in the
bearings and partial demagnetisation, which decreases performance of the motor. As with all
types of magnetic material, complete demagnetisation of the neodymium magnets can occur
at over 130 C.
Please make sure that cooling air can flow through the holes in the front plate to allow cooling
of the armature and magnets. There is a simple rule of thumb: the area of cooling air intake(s)
on your model should be at least twice the total area of openings on your motor. The area of
cooling outlet(s) should be larger than the intakes to allow for expansion of the heated air.
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