check this.
http://www.go-fast.com/BOAT_SPEED_PREDICTIONS.HTM
be sure to scroll down and click the propslip calculator too.
cool stuff
dose any one know how to figure speed with pitch to RPM
I have a 89 242Eliminator edge with a 24 pitch bravo 1 4 blade
turning 5100 rpm
thank Shawn
check this.
http://www.go-fast.com/BOAT_SPEED_PREDICTIONS.HTM
be sure to scroll down and click the propslip calculator too.
cool stuff
thanks now i need a gps