Forestay Sag and Rig Tuning
Printed From: myHanse.com
Category: General
Forum Name: Racing
Forum Description: Hanse Chat about various races, gear setup, sail choices, rig tuning, etc....
URL: https://www.myhanse.com/forum_posts.asp?TID=1262
Printed Date: 27 March 2026 at 03:40
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: Forestay Sag and Rig Tuning
Posted By: Rubato
Subject: Forestay Sag and Rig Tuning
Date Posted: 12 May 2007 at 15:43
Yes, I'm man enough to admit it - I'm suffering from forestay sag! 
My 400e arrived earlier this year and I've started racing it a bit. At the moment, she can not point as high as competitors. The racing sails, and jib in particular, were cut with a certain amoung of forestay sag in mind but not as much as we have at the moment (have about 10 inches in only 10-12 knots of breeze). Before recutting the sail, we're trying to eliminate as much sag as we can. Generally speaking, more backstay tension seems to just bend the mast more (depowering the main) as opposed to lessening the forestay sag. So at the moment, those doing this tuning for me are playing with the shroud tensions. I'm not confident in their methods as they seem a little ad hoc. So I thought I'd put it to the forum.....
What has your experience been in getting the rig tuned properly and in reducing forestay sag as much as possible? Are these rigs notoriously hard to tune?
I know they have to be tuned fairly often, particularly when the boat is new.
I just found this Selden guide on how to tune different rigs and this looks very interesting. http://www.riggingandsails.com/pdf/selden-tuning.pdf - http://www.riggingandsails.com/pdf/selden-tuning.pdf
I look forward to your comments
Steve
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Replies:
Posted By: Johan Hackman
Date Posted: 12 May 2007 at 17:01
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Steve, if I got it right the only way to reduce forstay sag on the kind of rig that our boats have is to tension the cap shrouds, and that it should be done really, really hard. When you tension the lower and intermediate shrouds the sag will increase, so if you want the lower and intermediate shrouds to be tensioned hard, you really want to tension the caps even more.
I haven't yet tuned my rig myself because I am too anxious it won't be done correctly. I have had somebody do it for me but I have watched them closely in order to learn how to do it myself. Johan -------------  http://www.johanhackman.se" rel="nofollow - http://www.johanhackman.se |
Posted By: Alex Faber
Date Posted: 12 May 2007 at 20:42
| As far as I know, you will get the maximum safe tension on your forestay (without the use of running backstays) with exactly following the instructions in the Selden book. If you are not satisfied with the result, you will have to add the running backstays. To my experience it is not so difficult to sail with those with the type of rigg like on the Hanses. |
Posted By: Phoebus
Date Posted: 03 March 2010 at 16:41
FOR YOUR REFERANCE IF YOU MAKE THE FORESTAY ADJUSTABLE AS I DID AND LOST THE FORESTAY LENGHT (AS U DID RUBATO - HARKEN TOGGLE IS DIFERANT THAN FACNOR) TOOK FROM SPARCRAFT
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