Like Tree0Likes

Tunnel Tab?

Reply
Old 07-03-2002, 10:34 AM
  #1
Organdonor
Guest
 
Posts: n/a
Default Tunnel Tab?

I am looking for opinions on Tunnel tabs when used on 30 Spectre however all experiences are welcomed?
What are the different makes that will fit this application?
What is the down side to not having one?
Is a Tab necessary?
Are there Alteratives?
Approximate Price?
 
Reply With Quote
Old 07-03-2002, 11:33 AM
  #2
Organdonor
Guest
 
Posts: n/a
Default

What nobody has an opinion?
 
Reply With Quote
Old 07-03-2002, 12:02 PM
  #3
Official OSO boat whore
Charter Member
Trade Score: (2)
 
Join Date: Oct 2000
Location: Mequon, WI
My Boats: 8' row boat
Posts: 6,157
Default

I do know that there was a halfway decent thread on the...um...hot boat board. Look under cats.
Cord is offline  
Reply With Quote
Old 07-03-2002, 05:37 PM
  #4
Mike J
Guest
 
Posts: n/a
Default

I understand theres a New
Flex tab that make the
Re-Entry a lot smoother,
Best hope some of the Cat
Men can give you some Help
Mike J.
 
Reply With Quote
Old 07-03-2002, 06:06 PM
  #5
The Senior Charter Member #1070
Charter Member
 
Tbonepmp's Avatar
 
Join Date: Feb 2001
Location: STL / LOTO
Posts: 2,083
Question SOMEBODY HELP!!!!!!

I AM CURIOUS ABOUT THIS AS WELL...
HELP....HELP....HELP....HELP......HELP.....HELP:co nfused:
__________________
(What you see, is what you get!)
"Live every day to it's fullest for you give a day of your life to it."
Tbonepmp is offline  
Reply With Quote
Old 07-03-2002, 06:35 PM
  #6
Registered
 
Join Date: Nov 2000
Location: NJ
Posts: 560
Default tab

I only have exp. with Skaters, 28' and 32' both (2) eng. outboard.
I see no reason to have a tunnel tab, or tabs at all. (2) of my friends both have 30' Spectre's, one a outboard, and the other one a Inboard. neither have tabs, and we have discussed this option many times, neither think their boats would benifit, I have run a 28' Skater with a Tunnel tab, and the added weight at the stern hurt the balance. These are just my thoughts, and I am not as expert on Spec. by any means, KenP has a 30' and he is the man to speak to.
Philip
Philip is offline  
Reply With Quote
Old 07-03-2002, 06:46 PM
  #7
Official OSO boat whore
Charter Member
Trade Score: (2)
 
Join Date: Oct 2000
Location: Mequon, WI
My Boats: 8' row boat
Posts: 6,157
Default

How would the the weight throw the balance off? From my understanding most tunnel tabs use fixed turnbuckels. Maybe 10lbs each?
Cord is offline  
Reply With Quote
Old 07-03-2002, 08:00 PM
  #8
Platinum Member
Platinum Member
 
CigDaze's Avatar
 
Join Date: Jun 2001
Location: St. Petersburg, FL
My Boats: Cigarette 35 Cafe Racer
Posts: 21,346
Default

The flex tabs are really nice.

They are composite in design, cored with some kind of nomex felt encapsulated with either Kevlar or S-glass. They are flexure plates that behave much like a cantilevered beam with a point load near the end. The plate's don't hinge on a single point like most tabs and are do not act infinately rigid.

The plates curve and flex hyperbolically, giving way to a revolutionary way to create precise control surfaces with a more pronounced boundry layer that reduces shocks and improves the boundary layers....Great for 'intelligently' adjusting to pressure loads and changing angles of attack both hydrodynamically and aerodynamically.

We've done a lot of work on similar control surfaces on some up and coming military aircraft. The numbers prove the design.

I saw a few cats with these tabs in Daytona. I think they are working.
CigDaze is offline  
Reply With Quote
Old 07-03-2002, 10:24 PM
  #9
Registered
 
Sonny Spectre 30's Avatar
 
Join Date: Oct 2001
Location: Raleigh, NC
My Boats: 2007 Spectre 36
Posts: 482
Default

I have a 30' Spectre I/O with the tab offered by the factory. I am glad I have it. It allows you to dial out any mid range porpoise you might experience with your boat. I run it completely up at top speed and completely up at low speed. If you want to go really slow (20MPH) and stay on plane-use the tab and you can.

Hope this helps.

Sonny
Sonny Spectre 30 is offline  
Reply With Quote
Old 07-03-2002, 10:42 PM
  #10
Registered
 
Flashback's Avatar
 
Join Date: May 2002
Location: Winston Salem, N. C.
My Boats: 1985 Chris Craft- Chris Cat
Posts: 224
Default

I need a tunnel tab for my Chris Cat to eliminate the porpoise that starts in the high 90's. Dueclaws had talked to George Linder the designer of the Chris Cat about this problem on his Cat on a post some time ago. George recomended the tab. Does anyone know if Duelaws has installed the tab on his cat and or, if it works well? The tab is supposed to add aft tunnel compression as the cat tries to balance out hydrodynamics/aerodynamics
Flashback is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
fishead
General Q & A
0
11-03-2006 12:38 PM
Johnny Venomous
General Q & A
10
03-18-2005 06:38 PM
mmwalters
General Boating Discussion
7
06-06-2003 07:40 AM
mmwalters
General Q & A
5
05-27-2003 11:47 PM
MERCMAN
General Boating Discussion
4
04-03-2003 06:51 PM



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 01:26 AM.


Copyright 2011 OffShoreOnly. All rights reserved.