FPV Brushless Motors

Brushless motors are the heart of the propulsion system in every modern FPV drone. They are responsible for converting electrical energy from the battery into powerful rotational force that spins the propellers and lifts the machine into the air. Compared to older brushed motors, brushless motors offer significantly higher efficiency, power, durability, and reliability.

Key parameters describing FPV motors:

• Stator Size: Given as four digits, e.g., 2207, 2306, 1404, 1103. The first two digits indicate the stator diameter (the stationary part of the motor) in mm, and the last two indicate its height in mm. Generally, a larger stator means potentially more torque and power, but also higher weight and current draw.
• KV (RPM per Volt): A parameter indicating how many revolutions per minute (RPM) the motor will spin unloaded for each Volt of applied voltage. Lower KV (e.g., 1700-1900KV for 6S) is suitable for larger propellers and higher voltages. Higher KV (e.g., 2400-2700KV for 4S, 7500KV+ for 1S) is used with smaller propellers or lower voltages.
• Input Voltage (S): Motors are designed to operate within a specific LiPo battery voltage range (e.g., 2-4S, 4-6S).

At Avifly, you'll find a wide selection of motors suited for various drone sizes and flying styles.

Selecting the right motors is crucial for the performance, flight time, and handling characteristics of your FPV drone. Consider:

• Frame Size: The motor stator size should match the frame size and the propellers you plan to use. E.g.:
  • Whoops/Micro (1.6-2.5"): 08xx, 11xx, 12xx motors
  • Toothpicks/Ultralights (3"): 11xx, 12xx, 14xx motors
  • 3-4" Drones: 14xx, 15xx, 20xx motors
  • 5" Drones (Freestyle/Racing): 2207, 2306, 2208 motors
  • 6-7" Drones (Long Range/Cinematic): 22xx, 23xx, 25xx, 28xx motors (often with lower KV)
  Also, check the compatibility of the motor's mounting hole pattern with the frame (e.g., 9x9mm, 12x12mm, 16x16mm).
• Battery Voltage (S) and KV: These two parameters are closely related. General rule: higher voltage (e.g., 6S) requires lower KV (e.g., 1700-1950KV for 5"), lower voltage (e.g., 4S) allows for higher KV (e.g., 2400-2750KV for 5"). Choose the KV and voltage combination to achieve the desired power and efficiency with your planned propellers.
• ESC Compatibility: Ensure your ESCs have a sufficient current rating (A) to handle the maximum current draw of the motors under full load (check motor test data if available).
• Flying Style: For freestyle, motors with good torque (larger stator) and smooth operation are often chosen. In racing, low weight and fast response are key. For Long Range, efficiency is crucial.
• Quality and Brand: Reputable brands like T-Motor or BetaFPV offer motors made with high-quality materials (magnets, bearings, windings), which translates to performance, durability, and smoothness.

Besides basic parameters like size and KV, the performance, durability, and smoothness of an FPV motor are also influenced by its build quality and the materials used:

• Magnets: The quality and type of neodymium magnets (e.g., N52) affect the strength of the magnetic field, and thus the motor's power and torque. The shape and precision of their placement also matter.
• Bearings: High-quality ball bearings (e.g., Japanese NSK) ensure smooth operation, less vibration, and longer motor life. Cheap bearings quickly develop play or seize up.
• Windings: The quality of the copper wire and the precision of the windings affect the motor's efficiency and its resistance to high temperatures.
• Bell Balancing: Precise balancing of the rotor (bell) minimizes vibrations, which is crucial for the smooth operation of the flight controller's gyro and the quality of video recordings.
• Housing and Shaft Materials: Durable aluminum alloys for the bell and housing, and strong steel for the motor shaft increase resistance to mechanical damage during crashes.

Investing in motors from reputable brands, such as T-Motor (known for high quality and performance) or BetaFPV (offering good value for money), gives you greater confidence in the durability and performance of your powertrain.

Choosing the right brushless motors is a key element in building a well-flying FPV drone. Wondering what stator size and KV to choose for your 5-inch frame and 6S batteries? Are T-Motor motors better than BetaFPV for your flying style? How to ensure the motors will match your ESCs?

Our team will gladly help you make this decision. Contact us (details on the Contact Us page), and we'll advise you on the best motors for your project, considering the frame, weight, props, batteries, and preferred flying style.

We offer high-quality FPV motors from proven manufacturers, available with fast shipping from our warehouse in Poland.

Give your drone power and performance with motors from Avifly! 💪⚙️