Boom rise with reefing... How much? - Page 3 - SailNet Community
LinkBack Thread Tools
post #21 of 22 Old 02-07-2013
Senior Member
casey1999's Avatar
Join Date: Oct 2010
Location: HI
Posts: 3,388
Thanks: 21
Thanked 47 Times in 46 Posts
Rep Power: 6
Re: Boom rise with reefing... How much?

Reading all this with interest.

I was having the opposite problem, when both reefed and not reefed, my boom would droop, and I could not get the main sail haylard to tension the sail using that haylard alone. I need to have the raise the head of the main sail high, then pull the Tack of the sail down with the cunningham. This would both tension the main sails Luff and lift the clew to make the boom parallel. For some reason, no matter how much tension (or fear of breaking somthing), I could not get the sail luff to tension unless I used the cunnigham. When using the cunningham I could put low tension on the main sail's haylard, but provide most tension by using cunningham. Maybe play with the cunningham and main haylard to see what it does to

Here is a question:
Why does the boom need to be parallel? I would like to modify my sail by raising the clew to boom connection up by about a foot (I have a lose foot main). This would allow the boom to clear my head, and I doubt would negatiely impact performance much. I see a lot of open 40s and 60s with angled booms like this. Pros, cons?

Attached Thumbnails

Last edited by casey1999; 02-07-2013 at 06:48 PM.
casey1999 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #22 of 22 Old 02-07-2013
Just another Moderator
Faster's Avatar
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,970
Thanks: 113
Thanked 354 Times in 334 Posts
Rep Power: 10
Re: Boom rise with reefing... How much?

The booms need not be parallel.. there are plenty of examples of otherwise, including the majority of the ocean racers as your picture shows. In the 70s and 80s booms 'drooped' substantially as some extra unmeasured sail area was snuck in there by lengthening the leech and dropping the clews. (often an issue trying to fit a dodger onto an old IOR racer)

I think, esp for ocean sailing, there's some merit in raising the clew relatively as you reef, it can avoid tripping the boom in a wave.. for most of us coastal sailors I'm not so sure it's an issue. Having a sail with a routinely 'lifted' clew might create some extra headroom and avoid the >BOOM< of an unintended gybe on certain boats with limited boom clearance.
RichH and casey1999 like this.


1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is offline  
Quote Quick Reply Share with Facebook

Quick Reply

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


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

Email Address:


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
Boom vang for reefing safety? SanDiegoChip Gear & Maintenance 19 06-18-2012 05:49 PM
Running reefing lines OUTSIDE the boom Classic30 General Discussion (sailing related) 21 05-28-2012 03:15 PM
Running reefing lines through the boom. flyingwelshman General Discussion (sailing related) 7 05-24-2012 11:08 AM
Boom twists while reefing... MedSailor Gear & Maintenance 5 01-08-2012 07:11 PM
Profurl In-Boom Reefing/Furling Sailormann Gear & Maintenance 7 02-10-2007 08:39 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