Traveler span - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 14 Old 04-18-2014 Thread Starter
Barquito
 
Barquito's Avatar
 
Join Date: Dec 2007
Location: Madison, WI
Posts: 2,275
Thanks: 0
Thanked 27 Times in 27 Posts
Rep Power: 8
 
Traveler span

I have an old Lewmar traveler I will be installing. It will be spanning the cockpit from bench to bench. The traveler track is a double I-beam construction about 1" high and 1" wide. I can't find data on maximum distance this older beam can span. Do you think it can go 30" or so unsupported? If not, what method should I use to support the beam.

Bristol 27
Cirque
Barquito is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 14 Old 04-18-2014
Senior Member
 
Join Date: Feb 2012
Location: New Orleans Louisiana
Posts: 2,440
Thanks: 7
Thanked 88 Times in 83 Posts
Rep Power: 4
 
Re: Traveler span

Assuming it is 1"x1" that is pretty close to the Lewmar Beam Track 0 (24.7mm x 24mm). The current size 0 has a max span of 400mm (15.8 inches). Since I highly doubt that the track design has gotten weaker, no i don't think this will work.

I would also point out that the size 0 on an end boom sheet is pretty marginal for your boat. I would really recommend you go up a size, which would not only be better for the loads but also allow you to span this distance easily.

If you choose not to go up a size then you need to build a support brace strong enough to carry the loads. If you go this route then the easiest base is a 1.5"x1.5" heavy walled aluminium square extrusion as the bridge and then custom fit wood pads as the seat braces

Greg Rubin
Attorney
Stumble is online now  
Quote Quick Reply Share with Facebook
post #3 of 14 Old 04-18-2014 Thread Starter
Barquito
 
Barquito's Avatar
 
Join Date: Dec 2007
Location: Madison, WI
Posts: 2,275
Thanks: 0
Thanked 27 Times in 27 Posts
Rep Power: 8
 
Re: Traveler span

I got a good deal on the traveler, so, I think I will try bracing it. So, the aluminum brace would go under the traveler track, then where do the wood pads go?

I made a very simple drawing how I imagine this: This is a cross section of the cockpit with the blue traveler going between seats, and the grey aluminum bar under.


Bristol 27
Cirque
Barquito is offline  
Quote Quick Reply Share with Facebook
post #4 of 14 Old 04-18-2014
Senior Member
 
Join Date: Jul 2002
Location: Rhode island
Posts: 169
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
 
Re: Traveler span

Bar, Most of the load on the traveler is up so something as simple as a rod going down to the cockpit floor ( with a backing plate of course) is all you need. The rod would be in tension when in use.

John
jfdubu is offline  
Quote Quick Reply Share with Facebook
post #5 of 14 Old 04-18-2014
Senior Member
 
Join Date: Feb 2012
Location: New Orleans Louisiana
Posts: 2,440
Thanks: 7
Thanked 88 Times in 83 Posts
Rep Power: 4
 
Re: Traveler span

The seats are highly unlikely to be in a plane parallel to the traveler. If they are, then no wooden blocks needed. But otherwise that's pretty much it.

I appreciate you got a good deal on the traveler, but it really is right at the cusp (when new) of what the current generation of gear could handle. I don't have the specs available for the older generation, but it is very possible if it isn't a modern style ball bearing race that it will deform the track itself from the sheet load.

Greg Rubin
Attorney
Stumble is online now  
Quote Quick Reply Share with Facebook
post #6 of 14 Old 04-18-2014
no longer reading SailNet
 
Alex W's Avatar
 
Join Date: Oct 2012
Posts: 2,309
Thanks: 2
Thanked 140 Times in 133 Posts
Rep Power: 3
 
Re: Traveler span

A photo of which Lewmar traveler you have would be helpful for the discussion.

Is it the type where the car runs on 4 or 6 cartridge ball bearings in an I-beam shaped track? Those don't work very well and jam easily under high load compared to the more modern designs with recirculating bearings (I think this is originally a Harken design, but new Lewmar travellers also work that way). This is an image of that type, taken from Ericson forums:


If it uses the newer Lewmar car you could spend a little bit more money and buy new track meant to span the gap, but using the rest of the hardware from your existing purchase.

I'm no longer participating on SailNet.

Last edited by Alex W; 04-18-2014 at 11:19 PM.
Alex W is offline  
Quote Quick Reply Share with Facebook
post #7 of 14 Old 04-19-2014
Senior Member
 
tommays's Avatar
 
Join Date: Sep 2008
Posts: 4,296
Thanks: 1
Thanked 30 Times in 30 Posts
Rep Power: 7
 
Re: Traveler span

That is pretty much the smallest size they make

On the J24 it is just a hardwood block ? 2 x 2 more or less

There are so many pictures and guides on harkens sight for the hardwares ability you should be able to find something close that will cut way down on the guesswork

1970 Cal 29 Sea Fever

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
tommays is offline  
Quote Quick Reply Share with Facebook
post #8 of 14 Old 04-19-2014 Thread Starter
Barquito
 
Barquito's Avatar
 
Join Date: Dec 2007
Location: Madison, WI
Posts: 2,275
Thanks: 0
Thanked 27 Times in 27 Posts
Rep Power: 8
 
Re: Traveler span

Sorry guys. I was going on memory for the size of the track. It is actually about 1.5 inches wide. This is close to the Lewmar size 2. However, I am assuming that my old I-beam track has the same specifications as the new size 2. The new size 2 can span 31".



Here is the car (with the sheaves off)


Bristol 27
Cirque
Barquito is offline  
Quote Quick Reply Share with Facebook
post #9 of 14 Old 04-19-2014
Senior Member
 
Join Date: Feb 2012
Location: New Orleans Louisiana
Posts: 2,440
Thanks: 7
Thanked 88 Times in 83 Posts
Rep Power: 4
 
Re: Traveler span

Ya, that is a much larger beast than you had indicated. It will be fine.

The downside is that it's a roller car instead of a ball bearing car. Nothing wrong with it functionally but they are not as smooth or as easy to adjust as a ball bearing track.

Greg Rubin
Attorney
Stumble is online now  
Quote Quick Reply Share with Facebook
post #10 of 14 Old 04-20-2014
no longer reading SailNet
 
Alex W's Avatar
 
Join Date: Oct 2012
Posts: 2,309
Thanks: 2
Thanked 140 Times in 133 Posts
Rep Power: 3
 
Re: Traveler span

In my experience with them (using them on 3 boats) they don't adjust well under heavy load. I think I'd consider that a functional problem...

I wouldn't rush out to replace one if that is what my boat had, but I'm not sure I'd install a new one unless it was really really cheap and I had no budget.

I'm no longer participating on SailNet.
Alex W is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Life Span of a Boat casey1999 General Discussion (sailing related) 102 02-07-2013 09:09 PM
Biloxi Bridge Span Collapses After Barge Strike Freesail99 General Discussion (sailing related) 3 03-21-2009 02:01 PM
Life span of a boat??????????? T37Chef Sailboat Design and Construction 62 06-13-2008 08:31 PM
Life Span of a Sail fjc1022@comcast.net General Discussion (sailing related) 5 06-15-2006 05:54 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome