using larger props to lower slip #'s
#11
Getting prop info here unless you are talking to people that have similar boats to yours is going to be worthless.
Brett at BBlades is going to be your best advice or someone that races BIG boats WITH surface drives.
Brett at BBlades is going to be your best advice or someone that races BIG boats WITH surface drives.
#13
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Join Date: Jan 2017
Location: Clinton Township, Michigan
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Bigger diameter and littler pitch usually works the best, as long as the stern lift is a constant, prop diameter below the hull plane creating horizontal thrust and prop diameter above the hull plane creating vertical stern lift.
#14
Thanks for all the info. I tracked down some 1" spacers. I'm going to try some 34 pitch 17" 5 blades as soon as I can and then if the slip is still higher than I like ill throw the spacers in it. I honestly don't care much about slip I just don't want it blowing out the props at 100 in smooth water.
#15
Offshoreonly Advertiser
Offshoreonly Advertiser
Thanks for all the info. I tracked down some 1" spacers. I'm going to try some 34 pitch 17" 5 blades as soon as I can and then if the slip is still higher than I like ill throw the spacers in it. I honestly don't care much about slip I just don't want it blowing out the props at 100 in smooth water.
But, for future reference, we make billet aluminum spacer plates and we have a test program so you can try them without have to purchase them. We make them in 1/4" increments.
I don't think we ever actually heard what the actual depth of your prop shaft below the bottom of the boat is. Also, what is your rpm and speed at WOT? Let's get a actual slip #.
Brett
__________________
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
#16
Registered
iTrader: (1)
Thanks for all the info. I tracked down some 1" spacers. I'm going to try some 34 pitch 17" 5 blades as soon as I can and then if the slip is still higher than I like ill throw the spacers in it. I honestly don't care much about slip I just don't want it blowing out the props at 100 in smooth water.
#17
Offshoreonly Advertiser
Offshoreonly Advertiser
I went back and saw the prop shafts are 1.5" above the bottom.I believe the spacers are going to help quite a bit. 17-17.5" is plenty of diameter for what I believe to be a 42 Fountain.
Still would like to hear some actual performance numbers.
Brett
Still would like to hear some actual performance numbers.
Brett
__________________
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
#18
Registered
iTrader: (5)
I didn't think you wanted to try spacers.
But, for future reference, we make billet aluminum spacer plates and we have a test program so you can try them without have to purchase them. We make them in 1/4" increments.
I don't think we ever actually heard what the actual depth of your prop shaft below the bottom of the boat is. Also, what is your rpm and speed at WOT? Let's get a actual slip #.
Brett
But, for future reference, we make billet aluminum spacer plates and we have a test program so you can try them without have to purchase them. We make them in 1/4" increments.
I don't think we ever actually heard what the actual depth of your prop shaft below the bottom of the boat is. Also, what is your rpm and speed at WOT? Let's get a actual slip #.
Brett
#20
Offshoreonly Advertiser
Offshoreonly Advertiser
Oops, I have #6's.
Thank you,
Brett
Thank you,
Brett
__________________
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]