Re: Another new sail question/rant
It is not just about stretch. Even a traditional paneled kevlar sail has very low stretch characteristics. The big advantage of the 3DL type sails is the weight savings. Not only do they not have the weight of all the thread and seam allowances, they can also control exactly how many strands of kevlar they use, so they only use as much as needed. Even a few pound of weight savings is significant when you multiply those few pounds buy a 50' mast. One piece laminate sails are MUCH lighter than their paneled equivalents.
1979 Santana 30 Tall Rig