Boating Calcs vs Propeller Calc Utilisation & Stats

You asked for more calculators and we've added them. Boating Calcs has over 120 boating calculations and unit conversions and 120 reference pages. With Boating Calcs you can quickly and easily solve a variety of boating calculations from your iPhone or iPad. Not just calculators, but the ability save and open saved calculations and add calculators to a favorites list. You can also email calculator inputs and results so you can easily share your calculations. Search functionality enables you to quickly find the calculator you want. Chapters: * Area, Angles & Volume * Communications References * Unit Conversions * Finance Calculations * Fuel Calculations * Glossary / Acronyms * Line Calculations and References * Knot References * Mechanical & Electrical Calculations * Performance Calculations * Piloting Calculations * Propeller Reference and Calculations * Weather & Waves Reference and Calculations If there's a calculator or reference material you'd like to see added, visit our website and send us an email.

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Propeller Calc

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