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Propeller Terminology

The Michigan Wheel guide to understanding propellers. Here you will find everything from propeller parts to terminology that will help you understand how boat propellers work.

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Radius

The distance from the axis of rotation to the blade tip. The radius multiplied by two is equal to the diameter.

Propeller Terms

Blade Blade Tip Cavitation Constant Pitch Propeller Controllable Pitch Propeller Cup Cylindrical Section Diameter Fixed Pitch Propeller Geometric Pitch Angle Hub Leading Edge Non Thru-Hub Exhaust Over-Hub Exhaust Over/Thru-Hub Exhaust Pitch Pitch Reference Line Radius Rake Rotation Skew Slip Thru Hub Exhaust Track Trailing Edge Variable Pitch Propeller Ventilation

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