continuousWave.com: Whaler: Reference: Propeller Calculator
I am starting to get the jest of all this stuff.
Theoretically , my boat should run 60 mph at 6000 rpm with 0% slip.
Member BS Pro-Staff and Billbob Pro-Staff
Proud Member of Team Geezer... authorized by: billbob and "G"
Member BS Pro-Staff and Billbob Pro-Staff
Proud Member of Team Geezer... authorized by: billbob and "G"
Unfortunately 0% slip in water is impossible.
Fair Winds and Following Seas
Bill H. PTC USN Ret
Chesapeake, Va
Used to know this stuff pretty well, but from memory, with a rig set up by someone with the knowledge or the $ to experiment, the optimum is 8 to 10%. Drag boats shoot for 5 to 8. Typically, when you bring a boat home from the dealership, about 15 is par before you start tweaking - very few dealers know much at all about boat performance, it's just hit and miss with a lot of them.
Wannabe...
Wannabe...v2.0
A lot like the old Wannabe... except with fewer bad words. And Karate chop action. But, yes, still purtier than you.
As is, mine calculated out at 16% slip. My understanding is that the higher the rpm, the faster the speed, the less the slip. Ima beginner with wore out training wheels.:o
Member BS Pro-Staff and Billbob Pro-Staff
Proud Member of Team Geezer... authorized by: billbob and "G"
Not true. Below or above the recommended WOT you loose power. Here is some light reading for you. http://books.google.com/books?id=8w0...num=35#PPP1,M1
Fair Winds and Following Seas
Bill H. PTC USN Ret
Chesapeake, Va
Shot down..........:o
I was basing my new found knowledge on this formula of slip. Look like rpm is inversely proportional to slip????????????????
This formula:
.......................... SPEED X RATIO X C
SLIP = 100 X [ 1 - (-------------------) ]
.......................... RPM X PITCH
Last edited by Cane Pole; 05-01-2009 at 03:18 PM.
Member BS Pro-Staff and Billbob Pro-Staff
Proud Member of Team Geezer... authorized by: billbob and "G"