why cant we just add more blades to propellers and rotors to increase thrust?
In: Physics
Thrust is limited by the power of the engine. If you add more blads and keep the same engine it will rotate slower and the thrust is not increased.
The advantages of more blades are the same diameter propeller can produce more thrust or a smaller diameter can produce equal trust.
The drawback is the thrust when the airplane is stationary depends a lot on the diameter so if you want an airplane that quickly accelerates and takes off larger diameter and fewer blades are more efficient.
More blades alos result in a higher cost.
Adding more blades to an airplane model is common when engine power is alos increased to be able to have the same diameter
So it is a compromise between multiple factors.
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