Propeller Calc 4+

Name: Propeller Calc
Author: Frode Rørvik

Frode Rørvik

Progettata per iPad

- Gratis

Descrizione

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

18 mar 2024

Versione 3.1

The UI is tweaked to enhance usability. Speed can now be changed using a stepper or a slider control.

Lo sviluppatore, Frode Rørvik, ha indicato che le procedure per la tutela della privacy dell’app potrebbero includere il trattamento dei dati descritto di seguito. Per ulteriori informazioni, consulta l’informativa sulla privacy dello sviluppatore.