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Main Sails

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Created by Lexmark > 9 months ago, 26 Oct 2015
Lexmark
VIC, 218 posts
26 Oct 2015 4:59PM
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A Quick question
Are the reefs in the main at percentages of the sail area ??

Piros
QLD, 7303 posts
26 Oct 2015 4:07PM
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My rough guide. Reef 1, 2 & 3 ..10% , 25% & 40% others go more.

Lexmark
VIC, 218 posts
26 Oct 2015 5:33PM
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So its not just a case of "Reef the main" but by how much !!!!!!

Piros
QLD, 7303 posts
26 Oct 2015 4:50PM
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Select to expand quote
Lexmark said..
A Quick question
Are the reefs in the main at percentages of the sail area ??


Yes...break out the calculator and apply the above percentages to get a lineal measurement , is that what you are asking ?

MorningBird
NSW, 2711 posts
26 Oct 2015 6:49PM
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I have two reefs in MB main. Deep and f'ing deep. You only need incremental reefs if you are racing. My 2nd is a bit bigger than a trisail. From there I drop it.

EC31
NSW, 490 posts
26 Oct 2015 6:56PM
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As each boat handles different, there are no hard and fast rules, so you need to plan ahead. Once you are starting to get the main inside out and the boat is shipping water over the sides, you are way past the point where you should have put in the next reef.

On my East Coast, a mast head sloop with fin keel, our full racing genoa will drive the main comfortable until about 15 knots. Our #2 on the furler will go to 25, but the main wants a reef about 20. We haven't found the limit of our #3 (not brave enough), but I had 2 reefs in the main at 35 on Pittwater. Our old main had 3 reef points, our new one only has 2, so we have some more learning to do.

If you are thinking about a reef, it is time to put one in. Reef early and relax. When it passes, pull out the reef and relax some more.

Lexmark
VIC, 218 posts
26 Oct 2015 7:27PM
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The reason for he question is that as not much of a sailor, with a S&S 36 R/C the second reef still leaves me with a lot ( about 80%) still up the next reef is all down, may be I need more reefs put in, so was asking if the reef were a percentage of the main ? in the norm

EC31
NSW, 490 posts
26 Oct 2015 7:58PM
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Probably best to ask your sailmaker. I found it best to take my sails to them, but I found some of the more expensive lofts will come out to your boat to do the measurement.

Lexmark
VIC, 218 posts
26 Oct 2015 8:23PM
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Yes, but the question I am asking is, Is there a set percentage of the main on the 1st...2nd etc reefs ???

FreeRadical
WA, 855 posts
26 Oct 2015 6:24PM
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Reefs are classified as a percentage of the luff length not sail area.

For racing Cat 5, min 25% reef.

For Cat 3 and 4, min 40% reef.


Lexmark
VIC, 218 posts
26 Oct 2015 10:36PM
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Thanks for your reply, may be the reefs are correct, but I am not applying them correctly, or not brave enough

Jolene
WA, 1624 posts
27 Oct 2015 7:47AM
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An important factor with regard to the position of reefing points is the strength of the mast and support. A deeply reefed main on a rig that is not designed to carry a load mid mast may in fact break. Baby stays and inner stay are often used to oppose forces of a reefed main just like check stays or runners oppose forces of a staysail

sirgallivant
NSW, 1531 posts
29 Oct 2015 2:27PM
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The new full battened main of mine is 15%-30%-45% with reef and cunningham cringles.

On the racing Adams10.6 two reefs but no reef lines reeved.

On the Adams 10 there are no reefing facilities at all. No cringles, nothing.

So there are no sails are the same as there are no skippers the same.
Yeah, general rule used to be 10-20-30% .
Go figure!




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"Main Sails" started by Lexmark