Does a forestay need a tension adjuster or not? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Chat  
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 > General Interest > General Discussion (sailing related)
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 08-19-2011
Junior Member
 
Join Date: Aug 2011
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
blaurence46 is on a distinguished road
Unhappy Does a forestay need a tension adjuster or not?

Hi,
The forestay on my Beneteau sailing boat has a bottle screw tension adjuster under the furling roller (see pic). Unfortunately even with the bottlescrew fully tightend the forestay is still a bit loose which results in poor pointing ability. In other words the forestay eye to eye measurement is about 2 inches too long for use with the bottlescrew, blah!
Can I get rid of the bottle screw and replace it with something shorter, if so, what? Would this need to be an adjustable thing? ie will the forestay stretch a bit over time?
I could just shorten the forestay and keep the bottlescrew but this will result in having the foot of the headsail about nine inches above the deck when sailing close hauled. It seems to me that the boat would sail better if this gap was reduced to say 2 or 3 inches?
I don't mind fitting a longer forestay or shortening the forestay and keeping the bottlescrew but I do want to end up with a setup what will allow me to sail as fast as possible so I can get back to the pub first.
Attached Thumbnails
Does a forestay need a tension adjuster or not?-image0134.jpg  
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 08-19-2011
tommays's Avatar
Senior Member
 
Join Date: Sep 2008
Posts: 4,285
Thanks: 1
Thanked 30 Times in 30 Posts
Rep Power: 7
tommays will become famous soon enough
On most boats the forestay length would be a tuning/performance item to adjust the mast rake with the tension coming from and adjustable backstay
__________________
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.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 08-19-2011
celenoglu's Avatar
Senior Member
 
Join Date: Dec 2008
Posts: 594
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 7
celenoglu is on a distinguished road
Tensioning the forestay is always done via the backstay. In case the rigging is not properly adjusted, it might be necessary to adjust the forestay also.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 08-19-2011
Junior Member
 
Join Date: Aug 2011
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
blaurence46 is on a distinguished road
Unhappy

It's a fractional rig with an adjustable backstay. At the dock the mast is not straight visually but is leaning slightly towards the stern. I can then adjust the backstay to put rake at the top of the (leaning backwards) mast.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 08-19-2011
Senior Member
 
Join Date: Aug 2006
Location: Norway
Posts: 756
Thanks: 7
Thanked 56 Times in 51 Posts
Rep Power: 9
knuterikt is on a distinguished road
Lots of boats sailing without bottle screw on the forstay.

It's a good ide to find out why the forestay is to long, has it always been that way or is something shifting?

On most boats the forestay gets adjusted once, and the backstay are used for trimming.

You can replace the bottle screw with link plates and/or toggles.
A link plate is a piece of ss steel with holes that can take one clevis pin in each end.

Remember that the attachment must be able to flex for and aft and transverse.
To achieve this you will probably need to combine with a togle.

Some pictures on this site
link plate (Link Plate Extenders)
Standing Rigging - Eye Jaw Toggle, Stemball eye with cup, Double Jaw Toggle
toggle
Standing Rigging - Eye Jaw Toggle, Stemball eye with cup, Double Jaw Toggle

The link plates can also be custom made.

Contact a rigger to get the parts

Last edited by knuterikt; 08-19-2011 at 10:44 AM.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 08-19-2011
emoney's Avatar
Senior Member
 
Join Date: Jun 2010
Posts: 545
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 5
emoney is on a distinguished road
Is the rigging factory or has it been changed? 2" seems like a lot of stretch....
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 08-19-2011
Senior Member
 
Join Date: Apr 2003
Posts: 4,192
Thanks: 50
Thanked 37 Times in 36 Posts
Rep Power: 14
knothead has a spectacular aura about knothead has a spectacular aura about knothead has a spectacular aura about
Many boats have fixed length headstays. As has been mentioned, the headstay is usually tensioned by tightening the backstay turnbuckle/s or adjuster.

Also, having a turnbuckle under a furling system can sometimes lead to problems when the turnbuckle rotates instead of the drum.
Cotter pins are not really up to the task of holding a turnbuckle stationary when the force of a furler is added.
I've seen it done lots of times, but it's not really recommended.

Edit: The turnbuckle in the photo doesn't have a toggle on the bottom. A headstay should always be toggled at both ends.
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 08-19-2011
RichH's Avatar
Senior Member
 
Join Date: Jul 2000
Location: Pennsylvania
Posts: 3,030
Thanks: 13
Thanked 93 Times in 85 Posts
Rep Power: 15
RichH will become famous soon enough
All the previous posts are correct and valid. Backstay tension causes the proper tension in the forestay.

If 'poor pointing ability' is the chief problem and you do not have a roller furling mainsail, there are many trim and sail 'shape' issues that cause 'pointing issues'.

1. That backstay should be tightened to approx. 15-20% tension ... as on most 'recreational/cruising' boat that forestay (reacts with the backstay) should be operating at close to that tension value ... a sailmaker when designing such a sail will 'assume' that the correct tension is in the forestay wire which under normal sailing conditions (10-15KTS) allow the sail to take its proper designed shape.

2. Pointing is dependent on so called 'weather helm' and sail trim. Weather helm is adjusted *primarily* by mainsail luff tension. If you have a 'roller furling mainsail' you cannot do this and therefore must adjust by slight 'reefing' of the main. Otherwise, you must correctly control the main's luff tension ... and then adjust the shape and trim of the boat. Most who use woven dacron mainsails fail to 'properly raise' such sails which leads to poor pointing, aggressive heeling, slow and cranky boat with LOTS of weather helm (rudder being dragged through the water at an angle).
Use a FULL set of tell tales (luff/midcord/leech) plus a row of 'steering tales' on the jib at about 6-8 ft. above the deck; but, FIRST be sure that the mainsail is correctly raised which will affect proper 'shape' for the day's wind and wave venue: How to properly RAISE a woven dacron mainsail - SailboatOwners.com
If you have a roller furling mainsail ... the only way to 'balance' is re-rake the mast or slightly 'reef' the main.
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 08-19-2011
ASA and PSIA Instructor
 
Join Date: Apr 2000
Posts: 3,508
Thanks: 7
Thanked 19 Times in 19 Posts
Rep Power: 15
sailingfool will become famous soon enough
If you have a fractional rig, the only effective way to can provide forestay tension is with running backstays which are a pain for pleasure sailing. If you have aft-swept spreaders/shrouds terminating on the mast at the height of the forestay, you can tune in static tension. Have you tried to find what Bene has to say on the subject?
__________________
Certified...in several regards...
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 08-19-2011
Senior Member
 
Join Date: Jul 2006
Posts: 1,370
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 9
puddinlegs is on a distinguished road
...and put some silicon on your cotter pins.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Tags
forestay

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:

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

 
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
Adjusting Forestay Tension w/ Schaefer Furling F4d3d Gear & Maintenance 4 12-12-2010 10:56 PM
Forestay tension = pointing zz4gta Learning to Sail 13 03-23-2010 01:54 PM
How to tension forestay svobsession Gear & Maintenance 14 02-11-2010 02:25 PM
How to tension forestay with roller reefing? wysiwyg Gear & Maintenance 17 06-14-2007 01:09 PM
backstay adjuster jhowe Gear & Maintenance 2 02-26-2001 01:35 PM


All times are GMT -4. The time now is 03:28 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, 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.