Advantages of using variable pitch compared to fixed pitch:
1. The flight speed range of the aircraft is larger compared with the fixed-pitch blades.
2. The aircraft can be adjusted to a higher power efficiency performance at the corresponding flight speed within a larger flight speed range

one study has shown that a variable pitch propeller design can increase the maximal takeoff weight of the aircraft and improve power efficiency in hover, especially if the load varies for different missions......

For more info please switch to T-MOTOR'S Linkedin articlehttps://www.linkedin.com/pulse/why-you-may-need-variable-pitch-propeller/?trackingId=oLrMlAi3WbATH8D98HE%2F%2Bw%3D%3D

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