20XX PROFESSIONAL MULTICOPTER MOTORS

20XX MULTICOPTER MOTORS QUICK LOOK:

Neumotors 2000 series outrunner motors are professional / military grade multicopter motors.  Our experience with numerous production UAVs and top aerospace manufacturers ensures  20xx series motors are the truly the best drives in their class.

2025 motors weigh in at 3.35oz and feature high quality NSK bearings and internal cooling fans. Magnets are N42SH grade and winding insulation is rated for over 300F. Motors support multiple propeller mounting options.

      • 53.5mm OD
      • outrunner construction
      • 6mm shaft
      • Integral prop mounting hub
      • 26 poles / 24 slots
      • 20,000 max rpm
      • US component sourcing and assembly available

20xx SERIES LENGTH AND POWER RANGE

LENGTH
Continuous
Watts*
Max
Watts*
Physical
Length
Weight
200
400
25mm
96g


2025: Multicopter motor 200-400 watt class

Motor RPMs
per Volt
(KV)
Rm (Ohms) Io
@
10V
Torque
Constant
(mNm/A)
Torque
Constant
(inOz/A)
Max
Volts
Max
Amps
2025/8Y 395 0.143 0.40 24.224 3.43 38 11
2025/6.5Y 485 0.095 0.50 19.729 2.794 31 13
2025/4.5Y 700 0.036 0.70 13.669 1.936 21 19

 

MOTOR KV:

The motor sizes and KVs listed above are the most common for this particular motor range. Custom sizes and  KV (RPMs per volt) are usually available.  Please contact us for more details if you don't immediately see the solution you are seeking in the tables above.

KV is the term used in the brushless motor workspace to specify the number of rotations per minute that a motor will turn for each volt applied to the motor/ESC with no load on the motor.

Neutronics specifications are +/- 5%.

For a more complete discussion of KV, please go to our KV FAQ page.  

POWER RATINGS (Watts):

  • Continuous rating is the power the motor can deliver while maintaining the external housing temperatures below 100C.
  • MAX power is achieved at max RPMs and voltage, not at a partial throttle or reduced voltage.
  • MAX power rating is the power the motor can deliver beginning with motor at a temp of 20C until it reaches it's limit temperature of 100C.
  • The ratings are therefore dependent on a number of variables including air flow, ambient air temperature, contact cooling etc. Each application will present different variables.  

MTBF RATINGS:

When used within the constraints described above, BLDC motors' primary "wear" item(s) are the bearings supporting the shaft. Bearing life is inversely affected by speed, temperature, and radial and axial loads.  While an MTBF figure can be generated, it would be rendered invalid by excursions beyond prescribed temperatures or load limits - such as prop strikes, or side loads.  MTBF must be determined on a case by case basis, and even then, it would be subject to numerous exceptions.

MAX VOLTAGE

Limited by kv (RPMs per volt) times the applied voltage.  Max voltage must be kept below the voltage which will spin the motor over max rpm for the motor series.

MAX AMPERAGE

See power ratings above.

COMPONENT SPECIFICATIONS

  • Winding temperature:  -- 180C
  • Magnet grade: - 180C UH grade
  • Bearings:  Japanese SPB bearings

CONTROLLER SETTINGS: TIMING

  • APD controllers automatically adjust timing for optimum efficiency
  • Recommend low timing for controllers that require configuration

Pole Count vs. Pole Pairs

  • Neumotors lists the number of poles in a motor rotor. Example: N S N S would be a four pole motor.
  • Some ESC manufacturers use the term "pole pairs" which refers to the number of N and S pairs.  Example: N S N S would be a 2 pole pair motor.