Go Back  Offshoreonly.com > General Discussion > General Boating Discussion
building my own tunnel flaps >

building my own tunnel flaps

Notices

building my own tunnel flaps

Old 05-27-2003, 05:51 PM
  #1  
Registered
Thread Starter
 
timucin's Avatar
 
Join Date: May 2002
Location: istanbul
Posts: 1,580
Likes: 0
Received 0 Likes on 0 Posts
Default building my own tunnel flaps

i am going to make a 20 inch long ,single piston (comes from kiekhafer underwater flaps),aluminum tunnel flap for 28 skater.

pros advice needed
-shall i try something exactly same with tunnels shape? or use a simple form like a square?

-is one piston enough?

-how thick the aluminum should be?i am thinking 10mm
Attached Thumbnails building my own tunnel flaps-flp.jpg  

Last edited by timucin; 05-27-2003 at 06:01 PM.
timucin is offline  
Old 05-27-2003, 06:28 PM
  #2  
Registered
iTrader: (2)
 
Jolley's Avatar
 
Join Date: Jan 2002
Location: Cass Lake Michigan
Posts: 1,430
Received 1 Like on 1 Post
Post

I just made one from 3/8in.(approx.10mm,9.525mm) it is 28" wide x 24" has twin rams w/ merc pump. Up 30 deg. down 25 deg. Tim my cat has a taller tunnel height, you don't want the tab to tag the water after you are up on plane( stay parallel to the hull, to full out maximum in chop, the tab is mainly for flat water to change the aperture of the tunnel to roll your c/g forward and blow the air out where you want it!) although it has to be strong enough to be loaded at takeoff and off plane.. Be sure it is 6061 aluminum or better, as it has a high ksi loading capability(yield/bending) that you need. Look at Dana Marine Products, or Papke tabs from Prorock Offshore for ideas. I have a Cad model of mine that I can send you plus pix. Hope I helped you......... But be sure to consult the expert racers/riggers on this board.......... Chime in you all!!!!!!! The boat looks great 'T' it has a great attitude in the water........ See Ya ,Bill
Jolley is offline  
Old 05-28-2003, 05:06 PM
  #3  
Registered
Thread Starter
 
timucin's Avatar
 
Join Date: May 2002
Location: istanbul
Posts: 1,580
Likes: 0
Received 0 Likes on 0 Posts
Default

thnx for info .
its running better everyday..
Attached Thumbnails building my own tunnel flaps-gps.jpg  
timucin is offline  
Old 05-28-2003, 05:07 PM
  #4  
Registered
Thread Starter
 
timucin's Avatar
 
Join Date: May 2002
Location: istanbul
Posts: 1,580
Likes: 0
Received 0 Likes on 0 Posts
Default

jolley : i would be pleased if you send me pics.
thnx too much
timucin is offline  
Old 05-28-2003, 09:01 PM
  #5  
Registered
 
Join Date: Nov 2000
Location: NJ
Posts: 560
Likes: 0
Received 0 Likes on 0 Posts
Default Tim, what are the details?

Tim, at the 106 mph, what are the details, RPM? prop pitch? I thought you said the gears are 1:36 ? right? why are you doing the tunnel tab? just to get the 70mph lope out of the boat? you are going to carry quite a bit of weight and mass , be very careful with the tab in turns! please let me know the details of the 106, which props are you running?

Philip
Philip is offline  
Old 05-28-2003, 10:05 PM
  #6  
Registered
 
Join Date: Dec 2002
Location: chesapeake bay md
Posts: 959
Likes: 0
Received 0 Likes on 0 Posts
Default

Tim I am in the process of completeing a tunnel for my motion. I started with a set of Dana marine HP1000. It is 42''x 26''
mmwalters is offline  
Old 05-28-2003, 10:08 PM
  #7  
Registered
 
Join Date: Dec 2002
Location: chesapeake bay md
Posts: 959
Likes: 0
Received 0 Likes on 0 Posts
Default

Another view
6061 T6 1/4'' thick

Last edited by mmwalters; 05-28-2003 at 10:16 PM.
mmwalters is offline  
Old 05-28-2003, 10:10 PM
  #8  
Registered
 
Join Date: Dec 2002
Location: chesapeake bay md
Posts: 959
Likes: 0
Received 0 Likes on 0 Posts
Default

Philip How is it goin, is your boat ready to go? Have you had it wet yet? Other then the rain I mean.
mmwalters is offline  
Old 05-28-2003, 10:22 PM
  #9  
Registered
 
Join Date: Nov 2000
Location: NJ
Posts: 560
Likes: 0
Received 0 Likes on 0 Posts
Default

Hi Mike, No not been in the water yet, sitting in the rack at Smitty's. I had another gear case with a casting problem, new one is on now, but not run yet. If it keeps raining, I will have to take a boat to get to work. I see you are building a tab, looks great, better quality then you can buy from a ready made. Have you run in a boat with one yet?

Philip
Philip is offline  
Old 05-28-2003, 10:40 PM
  #10  
Registered
 
Join Date: Dec 2002
Location: chesapeake bay md
Posts: 959
Likes: 0
Received 0 Likes on 0 Posts
Default

Philip I had my boat out once for about 20min. I did not know that would the last clear day. No I have not run a cat with a flap. Any advice? I will try to get it out to the power coater this week. I am also trying to go to the races in Brick this weekend. Where are the pits and the best place to view the races? Maybe we can hook up.
Michael
mmwalters is offline  

Quick Reply: building my own tunnel flaps


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.