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Spinnaker vs Main Sail

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kurio99 View Drop Down
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Post Options Post Options   Quote kurio99 Quote  Post ReplyReply Direct Link To This Post Topic: Spinnaker vs Main Sail
    Posted: 14 Nov 11 at 12:51am
How is the main sail trimmed when flying an asymmetric spinnaker?  Is the main trimmed as would be normal without the chute?  I am referring to a RS100 type rig if it makes a difference.
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doeywizard View Drop Down
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Post Options Post Options   Quote doeywizard Quote  Post ReplyReply Direct Link To This Post Posted: 14 Nov 11 at 12:33pm
aparently with the 29er the main sail needs to be sheeted in abit to alow the spinicar to fill and channel the wind onto it, or  something like that,    sorry that is all I know i do not sail spinicaer boats
 
Excuse the spelling
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Rupert View Drop Down
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 14 Nov 11 at 12:46pm
Sheet the main in till it stops backing, like normal - this will likely be further in than without the spinnaker, as the apparant wind will be further forwards the faster you go. I'm not aware that you need to sheet in tighter than this, though.
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Stuart O View Drop Down
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Post Options Post Options   Quote Stuart O Quote  Post ReplyReply Direct Link To This Post Posted: 14 Nov 11 at 1:42pm
My experience is as Rupert says...very much sheet in and a little bit further than you normally think for the angle of true wind.
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Mister Nick View Drop Down
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Post Options Post Options   Quote Mister Nick Quote  Post ReplyReply Direct Link To This Post Posted: 14 Nov 11 at 4:53pm
You tend to sail higher with an asymmetric spinnaker, resulting in more speed. This means that the apparent wind direction rotates further around towards the front of the boat. Therefore you need to sheet the mainsail on tighter than you would do if you were sailing without the spinnaker. You can usually tell if the main isn't in enough because it will be backing and generally not doing much. Be aware that having the main on too tight it will kill the airflow over the sails and slow the boat down significantly, so if the boat feels sluggish then give the main a little ease and see if it helps. 

Edited by Mister Nick - 14 Nov 11 at 9:15pm
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bferry View Drop Down
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Post Options Post Options   Quote bferry Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov 11 at 8:27am
I tend to sheet in enough to stop the sail backing as suggested above, and get the tell tails flying neatly.  In a breeze I prefer to sheet in less so as to keep the boat flat.  Sheeting in means more sidewards pressure=more hiking and more playing of mainsheet+spinny in a gust.
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