Propeller's Diameter
Propeller’s Diameter
The Cup of the propeller
By Thomas P.

The second key feature along with the diameter that defines the size of a propeller is the pitch. Like the diameter, the pitch is measured in inches and it is the one we usually change so as to allow the engine to reach the maximum rpm suggested by the motor manufacturer.


The term “Pitch” stands for the theoretical distance a propeller moves forward when it makes a complete rotation. A propeller i.e. with a pitch of 21" will travel forward 21-inches in one complete rotation.

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