why doesnt most cats have trim tabs?
11-08-2010 | 10:12 AM
#2
Charter Member
Joined: Jan 2001
Posts: 7,663
Likes: 2
From: Edgerock Baby!!
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.
11-08-2010 | 10:52 AM
#3
Neno the mind boggler
Joined: Sep 2001
Posts: 13,080
Likes: 320
From: toledo oh
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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Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
11-08-2010 | 12:08 PM
#6
Registered
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11-08-2010 | 12:31 PM
#9
Gold Member
Joined: Apr 2010
Posts: 1,988
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From: Rochester, NY
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.
