Correct forestay diameter? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 04-15-2007
Junior Member
 
Join Date: Apr 2007
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
wysiwyg is on a distinguished road
Question Correct forestay diameter?

I intended to install a Harken Cruising Jib Reefing and Furling Unit 1 on a heavy displacement 33' boat. The spec. says it covers typical boat lengths of 28' - 36', max. forestay dia. of 5/16", and clevis pin 1/2" or 5/8".

I measured the forestay as 3/8" and the clevis pin as 1/2". These don't seem to match up - the forestay is stronger than the clevis pin!

I suspect that a previous owner put a larger diameter forestay on the boat.

How do I decide whether I can reduce the forestay down from 3/8" to 5/16"?

(West Marine give the breaking strengths as 14,800 and 10,600 lbs. A significant difference!)

Thanks.
Reply With Quote Share with Facebook
  #2  
Old 04-15-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
It would help if you said what the boat was... since someone here may own the same boat or might know what the original specification for the forestay was.

Generally, as a rule, the more information you can give about your situation, the better the answeres you get will be.. Leaving out things like what kind of boat you have is a common newbie mistake.
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #3  
Old 04-15-2007
Senior Moment
 
Join Date: Aug 2006
Location: Michigan
Posts: 222
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
RickBowman is an unknown quantity at this point
Contact Harken tech support for the proper fit.
Reply With Quote Share with Facebook
  #4  
Old 04-15-2007
Member
 
Join Date: Nov 2006
Location: Beacon, New York
Posts: 652
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Tartan34C will become famous soon enough
First, a 3/8” headstay is a very large wire for 33 foot boat even if she is heavy. Second, a pin and wire usually have some relationship in size. The common rule of thumb is a pin is twice the wire size. Your instructions say 5/16” inch wire and a 5/8” pin or a 1/4” wire and a 1/2” pin and that bears this rule out.

What boat is this? I have rigging information for a lot of boats so I may have something on yours if you share this information.
All the best,
Robert Gainer
Reply With Quote Share with Facebook
  #5  
Old 04-15-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Rick-

I don't think the real problem the OP is trying to address is the furling unit, but the discrepancy in the sizing of the forestay and forestay clevis pin.
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #6  
Old 04-15-2007
Junior Member
 
Join Date: Apr 2007
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
wysiwyg is on a distinguished road
Question

Thanks for the replies.

The boat is a Tradewind 33.

I'm trying to decide whether I can reduce the forestay from 3/8" to 5/16" so that I can go ahead with the Harken furling unit (Unit 1).

I don't want the mast falling down!
Reply With Quote Share with Facebook
  #7  
Old 04-15-2007
Thanks Courtney.
 
Join Date: Sep 2006
Location: IL
Posts: 3,954
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 11
T34C has a spectacular aura about T34C has a spectacular aura about T34C has a spectacular aura about
I agree with Robert, 3/8 sounds big for a boat of that size. (Dumb question, but have you double checked your measurement?) I would say updating the standing rigging is never a bad idea, but does it need replacing? Have you looked to see if other furlers have a differnet range of wire diameters they will cover?
__________________
hunter Legend 37 Semper Paratus
Formerly - Tartan 34C Yawl
Reply With Quote Share with Facebook
  #8  
Old 04-15-2007
Member
 
Join Date: Nov 2006
Location: Beacon, New York
Posts: 652
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Tartan34C will become famous soon enough
That is a heavy boat. The company that built the John Rock designed Tradewind 33 is still in business. Give them a call at 44 (0) 1202 767412 or visit the web site at "www.tradewindyachts.co.uk". This is a question worth asking and it’s worth going to the source for this one. Either way 3/8” is larger then you need and in my mind the question is if you should use 1/4” wire and match the 1/2" pin or is there some reason to use 5/16” which I think is still a little bit large.
All the best,
Robert Gainer
Reply With Quote Share with Facebook
  #9  
Old 04-15-2007
billangiep's Avatar
Senior Member
 
Join Date: Dec 2003
Location: Florida Gulf Coast
Posts: 295
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
billangiep is on a distinguished road
I have to agree with the rest of the gang here that 3/8" is way big and 1/4" as Tartan said is probably the correct size? As a general rule of thumb any two stays or shrouds should be able to carry the displacement weight.
Bill,
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
SO 43 releasable inner forestay JoeKerridge Jeanneau 11 06-21-2007 06:06 PM
Forestay Attachment jkolle Gear & Maintenance 1 06-16-2006 05:56 AM
Jersey Clipper forestay breaks @ Sail World Australia NewsReader News Feeds 0 04-15-2006 08:15 PM
Jersey Clipper forestay breaks @ Sail World UK NewsReader News Feeds 0 04-15-2006 06:15 PM
C&C 24 Forestay Broke DanCary Gear & Maintenance 2 01-25-2003 11:52 AM


All times are GMT -4. The time now is 05:30 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.