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 Proper Method of Sail Trim		  New Topic  Topic Locked
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18 Posts
Initially Posted - 10/30/2001 :  20:12:52  Show Profile
On the 250WB is the proper way to trim sails to first trim the jib and then trim the mainsail to the point the leading edge begins to flutter a bit and then back off? A crew member suggested this to me and it seems logical.

Thing Wind
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MarkTM
Navigator

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USA
178 Posts
Response Posted - 10/30/2001 :  23:24:00  Show Profile  Visit MarkTM's Homepage
I don't know that I trim either the main or the jib before the other. But, I do try to maintain proper trim on both. If the leeward and windward telltales are streaming on the jib, and if the leech telltales are streaming on the main, I'm satisfied. We
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Steve Milby
Past Commodore

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USA
5932 Posts
Response Posted - 10/31/2001 :  14:21:08  Show Profile
Your crewmember is correct.

As you know, when a sloop-rigged sailboat is sailing to windward, the drive is generated by the mainsail and the jib. When properly trimmed, the wind should be flowing smoothly across both the concave and convex surfaces of
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andy p
1st Mate

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55 Posts
Response Posted - 10/31/2001 :  17:07:36  Show Profile
I trim the jib first just using the telltales. Easy enough but the main is harder. I find the "leading edge flutter" technique not really that helpful. I have noticed that (on a beat anyway) small changes in mainsail trim have relatively large effect so
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Bill Holcomb
Admiral

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USA
769 Posts
Response Posted - 11/01/2001 :  08:39:49  Show Profile
Hi Andy,

You're sure correct about a properly trimmed mainsail sometimes inducing too much heel if the breeze pipes up. Many skippers ease the mainsheet (or the traveler) to spill wind out of the mainsail when this happens.

Another solution is to h
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Steve Milby
Past Commodore

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USA
5932 Posts
Response Posted - 11/01/2001 :  14:40:56  Show Profile
Hi Andy! Unless there is another boat nearby to help me gauge my speed, I can't estimate my speed accurately enough to know whether minor sail trim changes have helped or hurt my speed. Like most of us, my boat doesn't have an accurate knotmeter, or any o
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cathluk
Admiral

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USA
513 Posts
Response Posted - 11/02/2001 :  08:23:01  Show Profile
I'll jump in here - we have telltales at the trailing edge of our mainsail and I can usually get the bottom 2 flowing nicely, but have a very hard time getting the top one to trail even when the boat seems to have good speed and the jib is flowing well.
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Arlyn Stewart
Master Marine Consultant

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USA
2984 Posts
Response Posted - 11/02/2001 :  11:56:09  Show Profile
Cathy, what you describe is pretty typical due to the twist off of the upper portion which invaribly presents a differant profile.

Use of the vang and traveler will help ... but in reality, if you have three leach telltales on your main....you will l
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Steve Milby
Past Commodore

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USA
5932 Posts
Response Posted - 11/02/2001 :  12:13:06  Show Profile
Hi Cathy!
Without knowing more, I can't be sure why the upper telltale attached to the leech of your mainsail is not flying, but there could be multiple reasons.

First, remember that the jib and mainsail are not designed to work their best indepen
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.