High performance electric motors
Brushless&Sensorless Motor AXI
Brushless&Sensorless Motor AXI
V2
V2
Instruction Manual
Instruction Manual
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
AXI2220/12 AXI2220/16 AXI2220/20
Voltage range
2 – 3 Li-Poly
2 - 3 Li-Poly
2 - 4 Li-Poly
RPM per Volt
1200 RPM/V
910 RPM/V
720 RPM/V
Max. Efficiency
84%
83%
82%
Max. Efficiency
Current
15-30A (<75%) 10-25 A (<73%)
8-22 A (<72%)
No load current
1,5 A
0,9 A
0,7 A
Max. Loading
35 A / 60 s
29 A / 60 s
20 A / 60 s
Internal
resistance
39,1 m
75,6 m
111,6 m
Dimensions
27,7 x 39,9mm
27,7 x 39,9 mm
27,7 x 39,9 mm
Shaft Diameter
4 mm
4 mm
4 mm
Weight
82,5 g
82,5 g
82,5 g
The full weight range is applicable for electric gliders. Keep aerobatic and scale models
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
Motor Installation
The motor must be mounted on a rigid mounting with four (or eight) M3 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
note: the case of the motor rotates! Beware of unsecured wires, parts or RC flight equipment
etc. It is a good idea to fit a special former separating the motor “from the rest of world”.
The AXI motor design with its rotating case significantly increases the need of a robust motor
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
are using your motor at the upper end of it’s power range, or if you must use a fixed propeller,
please make sure that your motor really is securely mounted.
Radial mounting option
A new design of motor with a hardened steel shaft supported in three ball bearings allows
your motor to be radial mounted to the front of the motor mounting bulkhead (see pictures).
This feature is very useful for electric conversions of glow power models.
Fitting procedure for the supplied radial mounting prop adapter.
