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post #3 of Old 08-15-2012
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Re: Luff in the luff of main sail

The outhaul will help to flatten so that the sail isnt so easily 'backwinded'. Better is to slightly ease the jibsheet so that the 'slot' is operating at proper 'flow'; the stronger the wind the larger 'slot distance' between the main and jib is required; just the opposite when in light winds. You may also have to 'reset the location' of the jib fairlead car ... make sure that the jib luff is 'breaking' simultaneously along the entire jib luff after any other sail shape adjustment; although, if slight easing of the jibsheet doesnt correct the situation you may have no other choice but to move the jib fairlead car a wee bit more AFT (opens the jib leech).

Also too, tightening the backstay will cause the jib to become more 'draft forward' which causes the jib leech to 'open' and be further away from the main.

A little bit of so-called backwind is inconsequential, actually slight backwind may indicate perfect sail shape and trim .... so use your speedometer when making any adjustments to correct 'backwinding' as the highest speedo reading will validate 'perfect' sail shape and sail trim.

Last edited by RichH; 08-15-2012 at 01:04 PM.
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