330 prop slip w/ f350s

[ElyseM]

i was reading an older copy of saltwater which had the formula to calculate prop slip. i don't have my actual numbers, so i used the yamaha performance bulletin. at 3,500 rpm, the prop slip calculates at 30%! the article said 10% was optimum.

anybody with the same rig do their calculations?

will the new 4 blade props that yamaha is coming out with improve this?

thx, ron

 

[fishie1]

I thought prop slip should be calculaetd at WOT. No?

 

[ElyseM]

i do not know. is that a certain? using wot the calc is 19%. but since the 3500 is optimum cruise, shouldn't that be it? ron

 

[Anonymous]

http://www.go-fast.com/prop_slip.htm

http://www.mercuryracing.com/propellers ... ulator.php

 

[ElyseM]

thx guys. ron