Like Tree0Likes

Tab Location


Old 07-17-2007, 11:37 AM
Thread Starter
Join Date: Apr 2001
Location: Broken Arrow/GLOC OK
My Boat: 2003 Crownline 270
Posts: 620
Default Tab Location

what would the benefit or downside be to mounting tabs like in the pic below vs mounting them at an angle like the transom?

Attached Thumbnails Tab Location-1501361_2%5B1%5D.jpg  
FINMAN is offline  
Reply With Quote
Old 07-17-2007, 11:57 AM
Join Date: Jul 2007
Location: Austin,Texas
Posts: 2,111

You will get a variety of answers on this one. Here's mine.Conventional mount at same as deadrise works well. Velocity's from '80's always mounted at 1/2 deadrise @ 11 dergrees it works good too. If the boat rides high on the pad. Drag boat guys mount them flat like the picture. If you run in heavy water they tend to smack flat and give a stiffer ride. These I think are too close together and may interfere with water as it passes by the prop. Fountains most recently started mounting them flat but still at full width on boats that run 100 mph or more. Since then it has become trendy to mount them flat. The water only hits the outside corner of the tab and will break the cylinder on occasions. If it is to help chine walking they are not training wheels learn to drive it.
MOBILEMERCMAN is offline  
Reply With Quote
Old 07-17-2007, 01:26 PM
sleeper_dave's Avatar
Join Date: Apr 2005
Posts: 725

The force from the tabs will act perpendicular to the plane of the tab. The force you're interested in from the tab is a vertical one, either to level the boat side to side (vertical force will roll the boat about it's centerline) or to lift the stern (vertical force needed to do that). if you mount the tabs at an angle, only a portion of the force from the tabs is in the direction that you want (vertical), the rest is going sideways and creating drag you don't need.
sleeper_dave is offline  
Reply With Quote
Old 07-17-2007, 05:17 PM
Ginger or Mary Ann?
Charter Member
iTrader: (1)
US1 Fountain's Avatar
Join Date: Oct 2000
Location: L
Posts: 11,022

Seems you get more response from the tabs if they are mounted even with the hull, not horizontal. Water coming from under the boat is coming out in the same degree as the deadrise. Horizontal tabs will have the outside corners deeper in the water than a flush mounted tab when trimming down. Unless we are talking flat bottom fishing boats.

Are those mounted that far in from Formula, or an owner/operator installed setup? Looks outta wack
US1 Fountain is offline  
Reply With Quote
Related Topics
Thread Starter
Last Post
General Boating Discussion
02-17-2003 08:03 PM
01-26-2003 10:51 PM
10-12-2002 08:50 PM
General Q & A
04-24-2002 10:24 PM
General Boating Discussion
04-23-2002 03:58 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

Quick Reply: Tab Location

OSO Sponsor
OSO Advertiser
OSO Advertiser
OSO Advertiser