"Reefing Point" for Roller Furled Headsail? - 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 05-13-2012
rhumbunctious's Avatar
Junior Member
 
Join Date: Nov 2010
Posts: 19
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
rhumbunctious is on a distinguished road
"Reefing Point" for Roller Furled Headsail?

One of the significant drawbacks to a roller furled headsail is the combination of poor sail shape as well as stress on the roller furler when using the sail in a partially furled state, particularly in heavy weather.

I've long been thinking about whether it would be beneficial to add a kind of "storm jib reefing point" in a roller furled headsail which would behave similarly to e.g. an ATN Gale Sail, consisting of two reinforced grommets with a sewn in length of Dyneema between them, and a length of Dyneema the same length as the distance between the grommets, permanently atttached to the top grommet (or even just an extension of the line sewn in to the sail) and clipped to the bottom grommet when not in use. When needed, it would be unclipped from the bottom grommet and attached to a second halyard, and a specially measured Dyneema tack line, of precisely the correct length from deck to grommet, would be attached to the lower grommet, and then the second halyard pulled tight. See diagram (not exactly to scale):



The red line is the sewn-in Dyneema length and the green lines are the pre-measured Dyneema halyard and tack lines.

Obviously, a solution like this wouldn't work for anything other than near the endmost section of the headsail, lest it mess up the shape of the sail, but for "storm jib" functionality, I'm thinking there may be real benefit, as it would be faster/easier to rig than a separate storm jib, would produce a better leading edge, would remove stress from the furler (and rest of the furled sail), and help prevent the furled portion of the sail from unrolling. And if the halyard is also Dyneema, it would collectively provide a second backup forestay, making the entire rig more robust in heavy weather.

Or is this just madness...? ;-)
__________________
If a man speaks at sea where there is no woman to hear, is he still wrong?
-
Cruising the Baltic in 'Merihiisi', a 1979 Westerly Berwick Ketch

Last edited by rhumbunctious; 05-13-2012 at 01:21 AM.
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 05-13-2012
Senior Member
 
Join Date: Feb 2007
Location: New Jersey
Posts: 2,029
Thanks: 5
Thanked 52 Times in 51 Posts
Rep Power: 8
Tempest is on a distinguished road
Re: "Reefing Point" for Roller Furled Headsail?

Rhumb,

Interesting concept. I would never call anyone mad, that attempts to find an elegant solution to a problem. " Post-it" notes, came from a laboratory mistake.

I do see a couple of issues with your solution, and wonder what your thoughts are.

1.) A furling headsail rolled up to the size of a storm jib would end up pretty high off the deck, too high imo, raising the CE considerably

2,) The weight/guage of the cloth of a proper storm jib is much heavier than that of a roller furling genoa. Would you propose having a different gauge material for the storm portion? If so, I wouldn't want the seam exposed; I'd want it rolled at least once around the furler. So you'd have to extend the heavier material beyond the final desired size.

3.) The new Head and Tack would need to be greatly reinforced beyond simply installing a grommet. The clew should be heavier/stronger than normal too.

How would that heavier material, and reinforcement affect the light air performance of the unfurled genoa?

Theoretically you could work out 2 and 3. I don't see a workaround for 1.
__________________
Tempest
Sabre 34
Morgan, NJ

Last edited by Tempest; 05-13-2012 at 07:47 AM.
Reply With Quote Quick reply to this message 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:

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
Bargain "storm mainsail" instead of reefing jameswilson29 General Discussion (sailing related) 11 11-30-2011 01:38 PM
On the mast, what is the "D2 and V2 attachment point"? Bene505 Gear & Maintenance 3 08-27-2010 06:28 AM
How to "maximize" the front sail ( roller furling ) SpcAlan1 General Discussion (sailing related) 11 09-08-2009 05:54 PM
Headsail choices - the "UPS" by Doyle Zanshin Gear & Maintenance 1 01-04-2008 02:55 PM
C270 Main Sail "stack Pack", Quick Cover", "lazy Bag" Install randy22556 Catalina 1 02-28-2007 12:53 PM


All times are GMT -4. The time now is 06:44 PM.

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.