Surface Drive Prop Rule
10-28-2008, 09:47 PM
#21
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10-28-2008, 09:58 PM
#22
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Surface drives give high slip numbers on most hulls other than extremely efficiant hulls. ie catamarans. People will argue that but I see it every other day. They do have their advantages though.
Keep the 17x29 4 blades and let us have a crack at them. I know we can improve the slip and speed numbers.
Keep the 17x29 4 blades and let us have a crack at them. I know we can improve the slip and speed numbers.
you want to mess around w/my 17x23's
10-28-2008, 09:58 PM
#23
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Bret,, thats what i ment,,,, he runs 17 X 23 !!!!!!! To small .
But i need to actually have you take a look at my prop.
My slip # is up like 18-20 % ????????? And the hull is perfect straight.
But i need to actually have you take a look at my prop.
My slip # is up like 18-20 % ????????? And the hull is perfect straight.
10-28-2008, 11:44 PM
#24
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Brett, or DD with a 1:54 ratio trans and an 18% over drive/drive "for round # sake" @ 6000 rpm engine speed, the out put of trans. would be 4000 that is to say: 3 rev. of engine speed produces 2 rev. of trans. out-put X 1.18 would produce a prop. shaft speed of approx:4720 with a 17x23 wheel and say a 10% min. slip what do you guys fig. for mph ? ps: just 4-kicks and giggles Ritchie Sutphen says that his boats, back in the day ran excellent w/Kaama surface drives ! Thanks again.
Last edited by I'CE; 10-28-2008 at 11:55 PM.
10-29-2008, 10:51 AM
#27
Surface drives give high slip numbers on most hulls other than extremely efficiant hulls. ie catamarans. People will argue that but I see it every other day. They do have their advantages though.
Keep the 17x29 4 blades and let us have a crack at them. I know we can improve the slip and speed numbers.
Keep the 17x29 4 blades and let us have a crack at them. I know we can improve the slip and speed numbers.
10-31-2008, 11:20 PM
#28
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car biz, send me a PM w/price if u-wish on the 16.5x 24's, I might consider a spare set, thanks for the photo. so your look-in for a long style hub/19 spline shaft, same as a #3 uses around a 17x27 or so correct ? ps: u-puttin more hp in that hull ?
Last edited by I'CE; 10-31-2008 at 11:25 PM.
10-31-2008, 11:21 PM
#29
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dd thank you very much I will chase u-down in KW
10-31-2008, 11:35 PM
#30
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let me know what he says.
Last edited by I'CE; 11-01-2008 at 12:03 AM.
