how to figure speed useing pitch to RPM

[lnsper]

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

[bordsmnj]

check this.
http://www.go-fast.com/BOAT_SPEED_PREDICTIONS.HTM
be sure to scroll down and click the propslip calculator too.
cool stuff:cool:

[lnsper]

thanks now i need a gps

[SHAKE-YO-AZZ]

;)