1. Speed: The size, shape and quality of the blades will directly affect the speed of the windmill. If the blades are larger or heavier, the rotation speed may be slower, otherwise it may be faster.
2. Rotational stability: Whether the blade design is reasonable will also affect the rotational stability of the windmill. If the blade shape is uneven or unreasonable, it is easy to cause the windmill to rotate unsteadily or swing greatly.
3. Blade material: The blade material will also affect the efficiency and life of the windmill. Poor blade material quality, poor wear resistance or easy corrosion may affect the service life and energy conversion efficiency of windmill.
4. Resistance: The design and material of blades will also affect the resistance of windmills. Improper blade design or heavy materials will increase the resistance of the windmill and reduce its speed and efficiency.