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Enter the following values in to the calculator
KV – The KV value of the motor
Cell Count – The amount of cells in series
Drive Motors – Single or Twin Drive System
Select a prop from the list
Select a Hull Type
Power class is determined by unloaded RPM’s only.
Speed in km/h and mph is calculated based on the data entered. Performance levels are determined.
SAW, is for expert boaters. It is important to have a lot of experience with Radio Control Brushless boats if using this type of setup. Range for error is extremely small. Visit Radio Control Boat Motor Selection for more details
to measure speed directly is very accurate.
An Octura X642 would have a Diameter of 42mm and pitch ratio of 1.6
The hull matched based on the previous selections you have made is the Mono Hull.
The mono hull is the most common hull type. It consists of a single hull usually in a V shape either deep or shallow. It’s characteristics consist of excellent rough water handling, but weaker in speed and handling. However, a mono hull is of the easier hull types to setup. Balance is usually found 25-35% of the hull starting from the rear transom where the hull touches the water. Visit Mono Hull For Setup Details.
Enter the information above to view the hull type best for you.
Enter motor KV and Cell Count
Prop Size in (mm)
This Calculator is to provide a safe conservative prop selection.
Please note: It should only be used to confirm predictions. It assumes proper hull size, weight and
motor size selections with motors larger than the 540 size. Prop Selections will not be calculated for Unloaded RPM’s that fall in to the SAW category.SAW, is for expert boaters. It is important to have a lot of experience with Radio Control Brushless boats if using this type of setup. Range for error is extremely small. Visit Radio
Control Boat Motor Selection for more details.
Enter The Loaded RPM of the engine
Select the Prop to be used from the drop down menu.
Select the Hull type to represent slippage.