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Go Back   SailNet Community > Skills and Seamanship > Seamanship & Navigation
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Seamanship & Navigation Forum devoted to seamanship and navigation topics, including paper and electronic charting tools.


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  #1  
Old 07-05-2014
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Sail up to reduce rolling?

Good evening!

So, I have what is probably a dumb question. When forced to motor (due to a virtual lack of wind) and being hit by 1-2 foot waves more or less abeam, my Hunter 306 rolls quite a bit. Same if not more so when the waves come from anywhere astern.

Is it my imagination, or is rolling reduced when raising the mainsail and keeping it tight and amidship? Does it act as a sort of "air keel" and provide stability?

Thank you!

Nico
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Old 07-05-2014
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Re: Sail up to reduce rolling?

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Originally Posted by EuroboyDC View Post
Is it my imagination, or is rolling reduced when raising the mainsail and keeping it tight and amidship? Does it act as a sort of "air keel" and provide stability?
Yes it helps. Still sucks....just not as bad as with no sail up in those conditions.

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Old 07-06-2014
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Re: Sail up to reduce rolling?

Yes it does help.
Its also quite rare to have absolutly zero apparent wind. Even with just 1 knot of apparent wind the sail will hole the boat quite well compared to no wind at all.

Mark
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Old 07-06-2014
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Re: Sail up to reduce rolling?

If you can manage your course to get a little angle on the wind it really helps. Put the traveller higher than you would (even boom a little above centre line) and just get a little air in the sail. Comfort vs speed and comfort can be a big factor - these days sailing is generally meant to be fun!
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Old 07-06-2014
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Re: Sail up to reduce rolling?

Not only an air keel, but the main can also be an air rudder
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Old 07-06-2014
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Re: Sail up to reduce rolling?

I motor sail to save fuel, but you are right, sail up while motoring allows you tighter angles to the wind (because apparent wind comes up)... but also settles the rock and roll a lot.

Can cut fuel usage in half too.
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Old 07-06-2014
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Re: Sail up to reduce rolling?

But flogging a sail can really shorten its life quite quickly. It is the worst thing you can do to a sail.
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Old 07-06-2014
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Re: Sail up to reduce rolling?

here in too much or tool ittle windville, i use my jib and mizzen for similar results. and i prevent the one with r'°the boom so as not to kill my pooor old boat.. when i use main i always prevent it .....usually to 2 points.....no flogging boom.. keep flogging on main to minimum
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Re: Sail up to reduce rolling?

Thank you all! I came across a similar situation again yesterday, and it really does work wonders. Not 100%, of course, but enough so to obviate the need for too much mopping during and after the trip. :-)

Cheers!
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Old 07-23-2014
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Re: Sail up to reduce rolling?

We used to fish out of our Coronado 25 in open ocean waters off of San Francisco. Often there was little or no wind but large chop & swell. The boat would roll a lot at trolling speed. We tried putting up the main but it banged around somewhat even with the main sheet tight. IIRC, it helped a small amount, but not enough to matter much. We finally gave up putting the sail up when trolling. When running at hull speed with the sails down,
the boat settled down pretty well and did not roll nearly as much a when trolling.

Perhaps you could do some comparative trial runs with the sails up & own?

Paul T
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