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There are various types of propellers available, 2 blade, 3 blade, …. The more the number of blades, the less efficient the propeller because each blade has to cut through turbulent air from the preceding blade.
It is always the most efficient to use the largest propeller diameter that the motor can safety accommodate (Aircraft Engine and Propeller Sizing | AeroToolbox). This is because a larger diameter prop allows thrust to be generated at slower RPM, whereas a small diameter propeller would need higher RPM.
If the motor manufacturers have specific requirements for props, make sure they are obeyed.
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