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rocker tabs fixed drive

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Old 01-23-2008, 11:31 AM
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gerard,

what type of hull do you have? I spent a lot of time and money trying to make bow lift on my surface drive powered boat. I would say that rocker tabs will not work (acknowledging that I don't know your setup). I also found that bow-lifting props were not enough.
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Old 01-23-2008, 06:10 PM
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its a 26ft fletcher zingaro with a 440hp diesel yanmar and 2speed transmission the drive is fixed at 6 deg and the all in weight is 2.3ton i was running a 29 4 blade rolla at 60mph but it was way too big 700rpm less than its max 3400rpm the hull is simlar to a sealine or bayliner . i have just bought a second hand prop off rr performance hopefully get to try it in a week or so due to the poor weather here at the mo

any help will be much appreciated

cheers gerard
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Old 01-23-2008, 07:38 PM
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Call Rick at Arneson.

Since surface drives need rocker in the hull and rocker plates add rocker I would think they would work. I've talked to Rick and he's a great guy and will take the time to talk to you.
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Old 01-23-2008, 07:50 PM
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BTW... Geoo (with the famed 120mph Donzi) picked up bow lift and over 10mph by installing rocker plates on his X18.
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Old 01-23-2008, 08:43 PM
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funny i was talking to rick today about a spline adaptor and have to call him back tomorrow i must mention it to him an see what he says
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Old 01-24-2008, 01:31 AM
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How about moving some weight toward the stern?
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Old 01-24-2008, 08:51 AM
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i have already gutted the boat out and rearranged it. all the weight is as far back as i can get it even the cuddy is empty
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Old 01-24-2008, 12:59 PM
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I added a horizontal fin to my Donzi.

It seemed to do the trick. Arneson rocker plates should help as well.



Jeff
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Old 01-28-2008, 09:15 PM
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Quote:
Originally Posted by hallj View Post
I added a horizontal fin to my Donzi.

It seemed to do the trick. Arneson rocker plates should help as well.



Jeff
how effective was the horizontal plate did you pic up any more speed or did it cause drag and reduce speed

cheers gerard
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Old 01-29-2008, 10:48 AM
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It lifted the bow quite a bit in turn increasing speed.

Jeff
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