Propeller Calculator
animprop.gif (2938 bytes)
Enter any 6 Variables and it Calculates the 7th
For Additional Info Read Instructions Below the Calculator 

Engine
RPM
Gear
Ratio
Propeller
Pitch
Boat Weight Boat
Length
Propeller
Slip
Speed
MPH


You must have a browser capable of running JAVA to use this calculator (Netscape 2.0+, MSIE 2.0+, or most other recent issue browsers. It WILL NOT RUN on Lotus Notes.

 

Units
Engine RPM = rev/min
Prop Pitch = inches/rev (add 1 inch for cupped props)
Boat Weight = approximate weight, less passengers.
Boat Length = round up to the closest foot, no inches
Prop slip may be entered as either decimal or integer values
(.15 or 15).
Speed = Miles/hour obtain speed data from a radar gun if possible, boat speedometers are notoriously wrong.