Leech flutter!

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M

Mark

How do you control (stop) it? Tighten the leech cord? Pull on the vang??
 
Jun 4, 2004
392
Hunter 31 and 25 and fomerly 23.5 Stockton State Park Marina; MO
Yes

start with the vang unless you're intentionally leaving it slack to de-power the sails in high winds. With the vang set where you want it if you still get flutter then tighten the leech just enough to stop it. BTW, your topping lift is slack and not holding the boom up artificially isn't it??
 
Dec 3, 2003
2,101
Hunter Legend 37 Portsmouth, RI
Leech Flutter

This will also happen if your track cars are not adjusted properly. Move them backward to reduce lower leech flutter and forward to reduce upper leech flutter. Your sheet cars should be adjusted to point directly thru to the luff line of the sail at a 90 degree angle so that the tension (pull) is tensioned evenly after all other adjustments are made.
 
Aug 11, 2006
1,446
Hunter H260 Traverse City
Main Flutter

The H260 does not have jib fairleads or a traveler so I have found the leech lines do a good job of reducing sail leech flutter.
 
Feb 2, 2006
470
Hunter Legend 35 Kingston
Flutter

Adjusting jib lead positions or the vang should NOT be used to reduce leech flutter. You SHOULD use the lead position and vang to adjust the trim of your sails to properly suit the wind speed and direction. Then, if you still have leech flutter, then use the leech line just enough to stop the flutter, and ease the leech line off once the wind eases up otherwise you will have too much "hook" in the leech. Leech flutter disturbs the airflow and slows you down a little, but more significantly, it is really hard of the material and stitching of your leach. If you cannot stop the leech flutter with the leech line, then you may need to take your sails in to see if a sailmaker can help.
 
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