Like Tree0Likes

Why mount tabs horizontal

Reply
Old 11-26-2006, 09:38 PM
  #1
Team Dysfunctional
Charter Member
Thread Starter
 
Hot Boat's Avatar
 
Join Date: Jan 2001
Location: PUTNAM VALLEY, Hudson River Valley
My Boats: 28 Scarab, Blown 850+ Hp
Posts: 1,419
Default Why mount tabs horizontal

I notice a few race boats at Key West run there tabs horizontal. what is the reason behind this. I going to be reinstalling my tabs next week and want to know what would be better.
Attached Thumbnails
Why mount tabs horizontal-tabs.jpg  
__________________
If it aint broke .... I can break it....
Hot Boat is offline  
Reply With Quote
Old 11-26-2006, 10:10 PM
  #2
Platinum Member
Platinum Member
 
mcollinstn's Avatar
 
Join Date: Sep 2001
Location: tn
My Boats: 1991 F311SR1
Posts: 5,491
Default Re: Why mount tabs horizontal

you ever snowski?
how'd you learn to stop?

didn't you learn to snowplow with the skis tucked in towards each other?

Let's consider an extreme..
What happens when you mount the tabs VERTICAL and put them "down"?
You snowplow, right?

So if you go from vertical (fully snowplowing)
to horizontal (no snowplowing), then you can see that the more you stray from horizontal, the more snowplow effect you will have when you tab below neutral.

When tabs are mounted at a matching angle to the deadrise, and you run them neutral, then there is no snowplow, there is just additional "hull length". This is useful. But when you have to run them below neutral, you start snowplowing.

There are arguments both ways. I guess the real answer depends on how much tab you need to run at racing speeds.
mcollinstn is offline  
Reply With Quote
Old 11-26-2006, 10:16 PM
  #3
Ginger or Mary Ann?
Charter Member
Trade Score: (1)
 
US1 Fountain's Avatar
 
Join Date: Oct 2000
Location: Lafayette. IN
Posts: 10,866
Default Re: Why mount tabs horizontal

Also heard of the snowplow effect described above.
US1 Fountain is offline  
Reply With Quote
Old 11-26-2006, 10:20 PM
  #4
Registered
 
epeek's Avatar
 
Join Date: Apr 2003
Location: Lake George N.Y.
My Boats: 35 Fountain Executioner
Posts: 1,530
Default Re: Why mount tabs horizontal

Quote:
Originally Posted by mcollinstn
you ever snowski?
how'd you learn to stop?

didn't you learn to snowplow with the skis tucked in towards each other?

Let's consider an extreme..
What happens when you mount the tabs VERTICAL and put them "down"?
You snowplow, right?

So if you go from vertical (fully snowplowing)
to horizontal (no snowplowing), then you can see that the more you stray from horizontal, the more snowplow effect you will have when you tab below neutral.

When tabs are mounted at a matching angle to the deadrise, and you run them neutral, then there is no snowplow, there is just additional "hull length". This is useful. But when you have to run them below neutral, you start snowplowing.

There are arguments both ways. I guess the real answer depends on how much tab you need to run at racing speeds.
HEY!! Your back! I look foward to your insight. Always
top notch.
Paul (hot boat). It's because its a Fountain....always on
the cutting edge.
epeek is offline  
Reply With Quote
Old 11-26-2006, 10:26 PM
  #5
Registered
VIP Member
 
berns29scarab's Avatar
 
Join Date: Jul 2004
Location: Brick, NJ
Posts: 6,969
Default Re: Why mount tabs horizontal

if beek boats do it, it must be right no ?













ONLY KIDDING !!

Have also gotten the snowplowing explanation makes sense to me but who am i ?
berns29scarab is offline  
Reply With Quote
Old 11-26-2006, 10:37 PM
  #6
Team Dysfunctional
Charter Member
Thread Starter
 
Hot Boat's Avatar
 
Join Date: Jan 2001
Location: PUTNAM VALLEY, Hudson River Valley
My Boats: 28 Scarab, Blown 850+ Hp
Posts: 1,419
Default Re: Why mount tabs horizontal

I have a 28' single engine. I only use the tabs when its rough water or during a poker run. When I do use them I dont need much tab, either flat with the hull or slightly lower, just enough to give the hull some extra length to keep the bow from lifting.

mcollinstn from what you said it sound that I would be best leaving them where they are , and using them more as a hull extension.
__________________
If it aint broke .... I can break it....
Hot Boat is offline  
Reply With Quote
Old 11-26-2006, 10:40 PM
  #7
Registered
VIP Member
 
berns29scarab's Avatar
 
Join Date: Jul 2004
Location: Brick, NJ
Posts: 6,969
Default Re: Why mount tabs horizontal

Quote:
Originally Posted by Hot Boat
I have a 28' single engine. I only use the tabs when its rough water or during a poker run. When I do use them I dont need much tab, either flat with the hull or slightly lower, just enough to give the hull some extra length to keep the bow from lifting.

mcollinstn from what you said it sound that I would be best leaving them where they are , and using them more as a hull extension.
if they are horizontal yes...
berns29scarab is offline  
Reply With Quote
Old 11-27-2006, 02:01 AM
  #8
Registered
 
AIR TIME's Avatar
 
Join Date: Dec 2000
Location: EASTON MA.
My Boats: BAJA OL 650HP/ SABER 28 Gellner unlimited with konrad ace
Posts: 6,281
Re: Why mount tabs horizontal

JEB BROWN was doing that back in the early 90's on his race boats
AIR TIME is offline  
Reply With Quote
Old 11-27-2006, 03:34 AM
  #9
Registered
Trade Score: (1)
 
Join Date: Jul 2002
Location: Palm Coast,Florida
My Boats: Activator SVL
Posts: 2,156
Default Re: Why mount tabs horizontal

do the water flow calcs b4 you decide to mount them. I have them horizontal on my fountain now, but I tried that on the Venom earler this year and I found them to be useless(tabs in down position caught 2 3/4" of a 30" tab) in that position so I went back to matching the bottom. Boat design detirmines alot when making this decision
F1-00 Racing is offline  
Reply With Quote
Old 11-27-2006, 05:03 PM
  #10
Who Me?
Platinum Member
 
FeverMike's Avatar
 
Join Date: Jan 2001
Location: Tampa
My Boats: 2006 38TE Fountain
Posts: 6,656
Default Re: Why mount tabs horizontal

Quote:
Originally Posted by CanDo
Installing the tabs horizontal is a very old idea. Far from cutting edge. CanDo
Very true. They were mounting tabs horizontal 12-15 years ago in A class.
FeverMike is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Michael1
General Q & A
11
10-23-2017 10:48 PM
Rage
General Q & A
26
04-13-2012 06:40 PM
mr_velocity
General Boating Discussion
6
06-11-2004 09:07 PM
envision
General Boating Discussion
1
04-09-2002 01:11 AM



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 07:34 PM.


Copyright 2011 OffShoreOnly. All rights reserved.