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Prop Block Dimension Calculator

Use this calculator to determine the dimensions of a propeller blank based on your desired DIAMETER, PITCH and BLADE WIDTH. Note: this program rounds the Prop Blank Dimensions to 1/16 of a unit, therefore it will work best if you use inches as the units.

Diameter
Pitch
Blade width			Prop Blank Dimensions
			Hub	Middle	Tip
P/D Ratio		Width
Blade Length		Thick

The Actual Dimensions Table shown below will allow you to see what the actual dimensions of the prop to be carved. Note that the Pitch values are not exactly the same as the Desired Pitch. This is due to the linear properties of the blank. The program has been adjusted to produce lower (but not too low) pitch values at the tip, effectively producing washout on the tips of the blades.

Actual Prop Dimensions
	Radius	Thick	Width	Angle	Pitch
Hub
Mid
Tip

George Bredehoft, Volaré Products, 1998