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why doesnt most cats have trim tabs?

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Old 11-08-2010, 11:10 AM
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Default why doesnt most cats have trim tabs?

?????
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Old 11-08-2010, 11:12 AM
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By nature cats tend to run flat from side to side because of the air cushion in the tunnel, and the tabs typically won't have near the effect on angle of attack that a tunnel tab will for that same reason. So if they need trim that the drives can't provide a tunnel tab makes more sense.
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Old 11-08-2010, 11:52 AM
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Yep. . . . . . What Ted said. We have them on the race boat and I have never used them once. Tunnel tab comes in handy once in a while though.
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Old 11-08-2010, 11:55 AM
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They dont need trims but if you dont have one in the tunnel good luck gettin on plane....
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Old 11-08-2010, 12:18 PM
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i see

thanks
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Old 11-08-2010, 01:08 PM
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Quote:
Originally Posted by antisocial View Post
They dont need trims but if you dont have one in the tunnel good luck gettin on plane....
Not all cats need or would benefit from a tunnel tab.
Mine gets on plane just fine without a tunnel tab.
I do use my trim tabs a small amount in rougher conditions
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Old 11-08-2010, 01:20 PM
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what is tunnel tabs? any pics?
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Old 11-08-2010, 01:24 PM
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i think it is a large tab between the 2 hulls ?? paul
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Old 11-08-2010, 01:31 PM
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Quote:
Originally Posted by Outkast Rafe View Post
what is tunnel tabs? any pics?
A Tunnel Tab looks like a giant Trim Tab mounted at the rear of the tunnel between the sponsons. It re-directs air more so than water because of it's location. Drop it down and you pack more air in the tunnel - which gives you more lift. On a center pod tunnel (Eliminator cats for instance), it works more like a single Trim Tab.
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Old 11-08-2010, 01:36 PM
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oh yes ive seen one of these before on a American Offshore i think
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