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post #14 of Old 05-19-2008
rabbit238
 
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Shields Racing

When setting the halyard tension in a Shields we look for the position of the maximum draft about 2/3 up the mainsail in combination with the windspeed. The tighter the halyard the more the maximum draft moves forward. We try to keep the maximum draft about at 50%. The stronger the breeze the more halyard tension is needed. It gets complicated since the shape of the sail is also strongly effected by the backstay tension and also the forestay length. For less breeze we look for a deeper sail. The Cunningham tends to get used in a strong breeze to effect the lower portion of the sail and move the draft forward. Other boats would be trimmed differently but the universal point is the desired shape of the sail is the goal for the particular windspeed and heading.

Last edited by rabbit238; 05-19-2008 at 01:02 PM.
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