Go Back   RIBnet Forums > RIB talk > RIBs & ribbing
Click Here to Login

Reply
 
Thread Tools Search this Thread
 
Old 06 June 2005, 13:50   #1
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Convert A frame Wakeboard tower

I don't suppose a normal A frame is beefy enough to be used as a wakeboard tower but are there ways of beefing it up enough??? Not just for wakeboarding but for towing big tubes - Hannah's fault!!! Getting me to look at those videos!!!

http://mail.sportsstuff.com/movies/index.shtml#

I was thinking what if you were to pre stress the A frame with 2 ratchet straps going from the top down to some fittings on the deck? Obviously the deck fittings would need to be pretty strong but it should work in theory - only problem would be sideways forces but they should be less than fore/aft.

Anyone done anything like this - or is a normal A frame strong enough to start with???
__________________
codprawn is offline   Reply With Quote
Old 06 June 2005, 15:37   #2
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Quote:
Originally Posted by codprawn
I don't suppose a normal A frame is beefy enough to be used as a wakeboard tower but are there ways of beefing it up enough???
I would suppose it depends on what your A frame is made of.

If it's 2" SS tubing, amply braced, it would probably be fine.

If it's 1" Aluminum, I'd be [edit:more than] a bit leery.

Gotta watch those cute young girls; they put ideas in your head...


jky
__________________
jyasaki is offline   Reply With Quote
Old 06 June 2005, 16:26   #3
Member
 
Country: Belgium
Make: Osprey
Length: 7m +
Engine: 250 HP E-Tec
Join Date: Nov 2004
Posts: 258
I’ve asked the same question for my A-frame when I ordered my rib. The tubes are 1 ½ inch. The A-frame would be strong enough but not the fittings to my deck. They would have to ad an extra inox tube.

That would not have been an elegant view, so I chose for a removable ski-pole.

Paul
Attached Thumbnails
Click image for larger version

Name:	DSC_2148.jpg
Views:	258
Size:	189.6 KB
ID:	12447  
__________________
Seaharrier is offline   Reply With Quote
Old 06 June 2005, 20:56   #4
Member
 
Country: UK - England
Town: Margate / Ramsgate
Boat name: Bumbl
Make: Scorpion
Length: 8m +
Engine: Yanmar diesel
Join Date: Feb 2002
Posts: 2,837
I tow off my osprey A-frame no problem.
__________________
Daniel is offline   Reply With Quote
Old 07 June 2005, 02:17   #5
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by Daniel
I tow off my osprey A-frame no problem.
What diameter tubes are they??? Any chance of a piccy??? Do you tow a ;arge inflatable tube? They must put on a hell of a load with 4 riders!!!
__________________
codprawn is offline   Reply With Quote
Old 07 June 2005, 03:14   #6
Member
 
Country: Australia
Town: Sydney
Make: Gemini
Length: 5.05
Engine: 85hp Yamaha
Join Date: Jun 2003
Posts: 105
I get the wife to drive and just stand at the back of the rib arms braced and holding the ropes.

It works but my back does get a bit sore.

HTH
__________________
EdwardH is offline   Reply With Quote
Old 07 June 2005, 16:19   #7
Member
 
Simon B's Avatar
 
Country: UK - England
Town: Leicester
Boat name: Vixen
Make: Ribcraft
Length: 6m +
Engine: Suzuki OB 175
MMSI: 235071839
Join Date: Jun 2004
Posts: 1,624
I'd urge caution when using an A frame for anything other than keeping all your elastic trickery aloft, 2" sounds sturdy but... Think how much it would cost if the thing snapped off clean and deep sixed all your antennae...Hmm pricey. This has happened to one friend that I know of.

Would a bridle put the load too low?
__________________
New boat is here, very happy!
Simon
www.luec.org
Simon B is offline   Reply With Quote
Old 07 June 2005, 17:58   #8
Member
 
Country: Belgium
Make: Osprey
Length: 7m +
Engine: 250 HP E-Tec
Join Date: Nov 2004
Posts: 258
Quote:
Originally Posted by Simon B
... 2" sounds sturdy but...
The frame can handle it but not the fittings.
__________________
Seaharrier is offline   Reply With Quote
Old 07 June 2005, 18:44   #9
Member
 
Country: Ireland
Town: Dublin
Boat name: wizzard
Make: REDBAY
Length: 7m +
Engine: 225 optimax
Join Date: Sep 2002
Posts: 835
Do a search about this, I can remember this was discussed maybe 18 months ago, towing with your A frame is like towing a car with a roofrack, unless properly designed to do so
__________________
www.dublinsislands.com

WHEN THE CAT IS AWAY THE MICE GO TO REDBAY..............
gavin is offline   Reply With Quote
Old 07 June 2005, 20:34   #10
Member
 
Country: UK - England
Town: Margate / Ramsgate
Boat name: Bumbl
Make: Scorpion
Length: 8m +
Engine: Yanmar diesel
Join Date: Feb 2002
Posts: 2,837
The osprey A-Frames are very strong and fixed to structural parts of the boat. I'd never tow another boat, inflatable toys or a banna-boat thing from it, far too much load - but for waykeboarding or skiing it seams OK.
__________________
Daniel is offline   Reply With Quote
Reply

« 6m jet RIB | Top | Ribex »

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 Off
Pingbacks are Off
Refbacks are Off




All times are GMT. The time now is 17:17.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.