The Importance of FPV motor torque calculations and How to Calculate it

FPV drone racing(FPV motor torque calculations) is a high-speed, high-performance sport that requires powerful motors to maneuver the drone quickly and efficiently. One of the key factors that determine the performance of an FPV motor is its torque, which is the rotational force produced by the motor. In this article, we will discuss the significance of motor torque in FPV drones and provide a step-by-step guide to calculating it accurately.

Section 1: What is Torque and Why Does it Matter in FPV Drones?

  • Definition of torque and how it is relevant to FPV motors
  • The impact of torque on the drone’s acceleration, turning, and lifting capabilities
  • Factors affecting torque output: motor size, magnet strength, winding configuration, and ESC settings

Section 2: How to Calculate FPV Motor Torque

  • The formula for calculating torque: torque = force x distance
  • Explanation of the force and distance components in the formula
  • Step-by-step guide to measuring propeller diameter, RPM, and power draw to determine torque

Section 3: Improving FPV Motor Torque

  • Techniques for optimizing torque output: upgrading motor components, adjusting propeller size and pitch, and optimizing ESC settings
  • The relationship between torque and efficiency: balancing performance with battery life and motor longevity

Section 4: Why Understanding Motor Torque is Important for FPV Drone Enthusiasts

  • Real-life examples of how torque affects drone performance: speed, maneuverability, and lift capacity
  • How to select the right motor based on torque requirements for different types of FPV racing


  • Is torque the same as thrust in FPV drones? No, torque and thrust are not the same. Torque is the rotational force produced by the motor, whereas thrust is the force that propels the drone forward. Torque affects the drone’s ability to accelerate, turn, and lift, while thrust determines the drone’s top speed.
  • Can a smaller motor have higher torque than a larger one? In general, no. A larger motor typically has more room for stronger magnets and winding configurations, which can produce higher torque than a smaller motor. However, it is possible for a smaller motor to have higher torque if it is designed with advanced materials and construction methods.
  • What is the relationship between torque and RPM in FPV motors? There is a direct relationship between torque and RPM in FPV motors. As the RPM increases, so does the torque output. However, the relationship is not linear, and the torque output will eventually plateau or decline as the RPM reaches its maximum limit.
  • How does torque affect the drone’s flight time? Torque can affect the drone’s flight time in two ways. First, a motor with higher torque will typically draw more power from the battery, which can decrease the overall flight time. Second, a drone with higher torque can perform more aggressive maneuvers, which can also reduce the flight time due to increased energy consumption.
  • How can I increase the torque output of my motor without sacrificing efficiency? One way to increase torque without sacrificing efficiency is to optimize the motor’s winding configuration and magnet strength. By using high-quality materials and advanced construction techniques, it is possible to boost the motor’s torque output without significantly increasing its power consumption or heat generation. Additionally, selecting the right propeller size and pitch can also improve torque while maintaining efficiency.


In summary, motor torque is a critical consideration when choosing an FPV motor for racing. By understanding how to calculate and optimize motor torque, drone enthusiasts can achieve faster speeds, sharper turns, and higher lift capacity, thereby enhancing their overall racing performance.


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