How to choose the appropriate blade diameter and motor combination

Selecting the appropriate rotor diameter and motor combination requires a comprehensive consideration of multiple aspects such as the application of the unmanned aerial vehicle, performance requirements, frame structure, motor performance, and actual flight tests. The following are some specific steps and suggestions:

First, clarify the purpose and performance requirements of the unmanned aerial vehicle

Purpose:

Aerial photography: Stable flight and considerable lift are required to carry a heavy camera and a stable gimbal.

Racing: Pursuing high-speed flight and flexibility, it requires smaller blades and powerful motors.

Crossing: It requires flying in complex environments, smaller blades and fast-responding motors.

Performance requirements:

Load capacity: Select the blade diameter and motor power based on the load to be carried.

Flight time: If a long flight is required, a combination of energy-efficient blades and motors should be selected.

Flight speed: If high-speed flight is required, small-diameter blades and high-power motors should be selected.

Second, consider the rack structure

Wheelbase:

The diameter of the blades must not exceed the wheelbase of the frame to avoid collisions between the blades.

Generally speaking, the larger the wheelbase, the larger the diameter of the blades that can be supported.

Motor installation position:

When the motor is installed close to the edge of the frame, smaller diameter blades need to be selected.

When the motor is installed close to the center of the frame, blades with a larger diameter can be selected.

Third, select the appropriate motor

Motor KV value:

The KV value represents the idling speed of the motor per volt of voltage.

High-kv value motors are suitable for small-diameter blades and can provide high rotational speeds.

Low KV value motors are suitable for large-diameter blades and can provide high torque.

Motor power:

Select the appropriate motor power based on the load and flight speed requirements of the unmanned aerial vehicle.

Generally speaking, the greater the power of the motor, the greater the thrust it provides.

Motor size:

The larger the motor size is, the greater the torque and power are usually, but it will also increase the weight of the drone.

The appropriate motor size should be selected based on the overall weight and performance requirements of the unmanned aerial vehicle.

Fourth, actual flight tests and adjustments

Flight test

After selecting the rotor diameter and motor combination, actual flight tests were conducted to evaluate the performance and stability of the unmanned aerial vehicle.

Observe the flight attitude, lift performance, flight speed and other parameters of the unmanned aerial vehicle to determine whether the rotor diameter or motor combination needs to be adjusted.

Parameter adjustment:

If problems such as vibration, instability or insufficient lift are found during the flight of the drone, you can try adjusting the diameter of the rotor blades or the motor combination.

It is also possible to try adjusting parameters such as the voltage and current of the motor to optimize the flight performance of the unmanned aerial vehicle.

Fifth, refer to official recommendations and community experiences

Official recommendation

Check the official recommendations from drone manufacturers or motor and rotor manufacturers to learn about the best rotor diameter and motor combinations for different models of drones.

Community experience

Check out drone enthusiast forums, social media and other channels to learn about the usage experiences and suggestions of other players.

You can exchange experiences and insights with other players by searching for keywords or joining relevant communities.

Sixth, Summary and Precautions

Balance performance and cost

When choosing the blade diameter and motor combination, it is necessary to balance the relationship between performance and cost.

High-end motors and blades usually have better performance, but they are also more expensive.

Consider future upgrades:

When choosing the blade diameter and motor combination, the possibility of future upgrades can be considered.

Select motors and blades with greater upgrade potential to enhance the performance of the unmanned aerial vehicle as needed in the future.

Safety first

No matter which blade diameter and motor combination is chosen, it is necessary to ensure the flight safety of the unmanned aerial vehicle.

Conduct thorough inspections and tests before the flight to ensure that all components are in good condition.

By following the above steps and suggestions, you can select the appropriate blade diameter and motor combination to meet the application and performance requirements of the unmanned aerial vehicle. At the same time, it is also necessary to pay attention to balancing the relationship between performance and cost, and ensure the flight safety of the unmanned aerial vehicle.