Propeller Calc
source

Propeller Calc

(1)
Price
Free
Category
Utilities
Last update
Mar 24, 2026
Publisher
Frode Rørvik Contact publisher
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Ratings & Reviews performance

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Number of reviews,
total
1
Avg rating,
total
⭐3.0
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User Reviews for Propeller Calc

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Description

838 chars

This calculator can determine pitch, gear ratio, RPM, propeller slip and speed parameters. Enter any four variables, and it will calculate the fifth. Use the toggle switch to choose which field to calculate. Pitch is the theoretical forward movement for one complete turn of the propeller. Every inch of the boat in contact with the water induces drag. Therefore, the distance travelled differs since the propeller is "slipping" behind the theoretical distance it should travel with each rotation. The difference between theory and reality is called slip. Depending on your application, slip typically ranges between 5% and 20%. A lower number is only sometimes what you are after. Slip of a prop changes with operating conditions and is not a direct measure of efficiency. Please consult professionals for guidance. Happy powerboating

Screenshots

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