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RC Airplane Motor Size Chart

RC Airplane Motor Size Chart

In the world of RC airplane aviation, brushless motors are to model airplanes what engines are to cars; both are critical power units. Without the right motor, even those new to the hobby might find it challenging to achieve a satisfying flight experience. Therefore, in this article, we, as seasoned RC airplane enthusiasts, have compiled an RC Airplane Motor Size Chart based on our extensive experience. This guide is designed to assist fellow RC airplane aficionados in their quest for the perfect flight.

RC Airplane Brushless Motor Size Chart

MotorkVLipoESCProp SizeEDF Fan SizeAirplane Size
2312980-2450kV3-4S20-50ADia: 7-11″
Pitch: 4-6″
2316980-1400kV3-4S30-50ADia: 7-11″
Pitch: 4-6″
2320860-1250kV3-4S30-50ADia: 8-13″
Pitch: 4-6.5″
28141000-1400kV2-4S40-80ADia: 8-13″
Pitch: 4-6.5″
2820550-1250kV3-6S80ADia: 9-14″
Pitch: 4.5-6.5″
2826540-1100kV3-6S80ADia: 10-15″
Pitch: 5-8″
2830-2849950-3300kV2-4S30-80ADia: 9″
Pitch: 5-6″
3520680-950kV2-4S50ADia: 10-14″
Pitch: 6-7″
3530860-1900kV2-6S30-100ADia: 9.5-10″
Pitch: 4.5-7″
3648-3672830-2150kV4-6S60-130ADia: 10-12″
Pitch: 6-8″
3748450-1835kV4-6S50-130ADia: 12″
Pitch: 7″
4220-4260480-1000kV2-6S45-80ADia: 10-14″
Pitch: 5-10″
Above 90mmGiant
5030-5065340-650kV4-8S60-120ADia: 12-18″
Pitch: 4-12″
6320-6362200-295kV6-12S120ADia: 16-20″
Pitch: 8-10″
8075-8085160-230kV9-15S120ADia: 22-26″
Pitch: 8-12″
RC Airplane Brushless Motor Size Chart

Within the world of model aircraft, brushless motors are classified by their size, indicated by a numerical code “XXYY,” where “XX” denotes the motor’s diameter and “YY” its length in millimeters. For instance, a 2212 motor would be 22mm wide and 12mm long. These dimensions are crucial as they influence the motor’s volume and, subsequently, its thrust capability.

The term “kv1400” signifies that with each 1V increase in voltage, the motor’s speed goes up by 1400 RPM (Revolutions Per Minute). Typically, the more powerful the motor, the larger the propeller it can handle, though this usually means a reduction in speed.

Common diameters include sizes such as 23mm, 28mm, 35mm, 42mm, 50mm, and 63mm, while lengths range from 12mm to 40mm, embracing a variety of models tailored to specific applications.

  • 22XX Motors: Primarily used in small, portable flying devices and small quadcopters. Model aviation enthusiasts can select these motors based on the required speed and thrust to suit their needs.
  • 28XX Motors: More commonly used than the 22XX motors, these are suitable for mid-sized quadcopters, multirotors, and portable quadcopters.
  • 35XX Motors: Ideal for large model airplanes and large multirotors, offering higher speed and thrust compared to smaller models.
  • 42XX Motors: Utilized in large quadcopters, helicopters, and fixed-wing aircraft, these motors provide higher power and torque than the 35XX motors.
  • 50XX Motors: Appropriate for giant quadcopters and fixed-wing aircraft, known for their high power and torque.
  • 63XX Motors: Designed for massive multirotors, large fixed-wing aircraft, and helicopters, these motors deliver exceptionally high power and torque.

When selecting the appropriate motor size, it’s essential to consider the size of the aircraft and its rated voltage, along with other critical parameters such as power, speed, and thrust. It’s also crucial to pair the motor with compatible propellers, electronic speed controllers (ESCs), and batteries to ensure optimal performance and flight efficiency.


Connecting the Three Wires: When linking the motor to the ESC, ensure the propeller is not attached. Connect the three wires and test the direction in which the motor rotates. If the motor rotates in the opposite direction, simply swap any two wires to correct it.

Securing the Motor: Never use hot glue to directly secure the motor to the aircraft. During flight, the motor can reach high temperatures, which may cause the hot glue to melt.

Water Damage: If your aircraft takes on water, it’s best not to fly it again to avoid potential damage to the electronic components, even if the brushless motor is waterproof.

Propeller Maintenance: In regular use, if a propeller’s dynamic balance is compromised, replace it immediately. A propeller with damaged balance can cause significant vibrations when spinning, leading to accelerated wear on the motor and potentially rendering it unusable.

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