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Arneson Rocker Plates, anyone using them?

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Old 01-18-2008, 09:36 AM
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Rocker Plates
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Old 01-18-2008, 09:56 AM
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Drag induced from a small contact area on each tab is less than the drag induced from the total area from each rocker plate in constant contact with the water. If both are able to alter the flow of water past the hull downward, and and thus force the stern up and the bow down, why not choose the tab that creates less drag?

I understand the ease or correcting a problem with a simple bolt on. But why add wetted surface when either rocker or hook can be added or removed from the hull, or the cg can be changed?
you don't necessarily add surface. Big boats, as well as the big cat shown above, use them integrated into the hull design.

Look at big sport fishing boats, most use the rocker design in some fashion, except more simplified.
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Old 01-19-2008, 01:35 PM
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Originally Posted by BradH View Post
Drag induced from a small contact area on each tab is less than the drag induced from the total area from each rocker plate in constant contact with the water. If both are able to alter the flow of water past the hull downward, and and thus force the stern up and the bow down, why not choose the tab that creates less drag?

I understand the ease or correcting a problem with a simple bolt on. But why add wetted surface when either rocker or hook can be added or removed from the hull, or the cg can be changed?
Because you can add or remove rocker/hook INSTANTLY and choose how much you want to add/remove. The benefit isn't from the added wetted surface(although with some boats it would help), the benefit is the added wetted surface can be instantly adjusted.

The theory behind them is using them for hook will give you more stern lift with less drag than a K-plane=more speed and using them for rocker will give you more bow lift with less positeve trim-more speed.
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Old 01-19-2008, 01:44 PM
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Rocker Plates

Nice! . . . what boat is that?
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Old 01-19-2008, 02:34 PM
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These are available. $1700
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Old 01-19-2008, 03:07 PM
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These are available. $1700

Dayuum that's a nice looking business-end of your boat!
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Old 01-19-2008, 04:54 PM
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Originally Posted by onesickpantera View Post
Because you can add or remove rocker/hook INSTANTLY and choose how much you want to add/remove. The benefit isn't from the added wetted surface(although with some boats it would help), the benefit is the added wetted surface can be instantly adjusted.

The theory behind them is using them for hook will give you more stern lift with less drag than a K-plane=more speed and using them for rocker will give you more bow lift with less positeve trim-more speed.
OK, but if they are able to increase speed, why are they rarely seen on raceboats?
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Old 01-19-2008, 05:00 PM
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OK, but if they are able to increase speed, why are they rarely seen on raceboats?
As Clay said in racing situations maybe because they poduce less drag so they can't use them to drag and lean the boat into high speed turns?
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Old 01-28-2008, 08:06 AM
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Thanks for the feedback!
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Old 01-28-2008, 03:58 PM
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I have a pair in excellent condition. Fresh water use only.
If still available. I maybe interested also.
My email addy-
[email protected]
Thanks Ken
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