Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 15-12-2008, 06:57   #1
Registered User
Jmolan's Avatar

Join Date: Dec 2007
Location: Mexico/Alaska/Oregon
Boat: 34' Searunner Tri
Posts: 712
Halyard Calculations

I have a 34' Searunner Trimaran. 35' mast twin spreader cutter rigged. What I am looking for is how do you determine the loads that the halyards carry? I am sure there is a place to find this, but I am stumped.
I suspect I may be loading more than a mono hull because in a puff the boat will be more stable and not heel and spill wind. If that is true than I may ned to up the load calculation some.
What I think I see is most halyards are spec'd for ease of use on the hands.
Where I am going is I have used 3/16 Dynex. It has a breaking strength of 1 ton

It has been great to use locally around here, but as I consider going for days offshore I want to know what kind of a margin I have (if any) on this line.

Since it was too small to be able to handle. I took a former halyard of 7/16's or 1/2" and took out the core for 10 or 15 feet. Then I ran the Dynex inside and black taped the ends. (ugly but so far has worked.) So it is like a wire to rope halyard with Dynex replacing the wire.

In a years use of a lot of sails I see no wear and no problems that are serious. I need to be careful when winching it up as it is so small it can ove ride if I am not paying attention. And the stuff really sings when going to a guitar string!

But all said I want to continue down this path, I do not have a pile of expensive unused stuff after i hoist the sail, it is easy on the hands, super-light, and not much $. What am I missing?

How can one determine the loads being involved?
Jmolan is offline   Reply With Quote


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Halyard Frustration sneuman Construction, Maintenance & Refit 31 02-12-2010 20:50
Are my calculations right to add a fridge? bmiller Electrical: Batteries, Generators & Solar 6 12-11-2008 02:16
Halyard Stretch Sandero Deck hardware: Rigging, Sails & Hoisting 1 22-07-2007 16:45
main halyard Capt.Shaggy Meets & Greets 4 13-03-2006 13:57
Halyard Problem capt lar Construction, Maintenance & Refit 16 10-01-2006 11:14

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 01:13.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.