Rick, I can understand losing the shape advantage with a tri-radial while furled but double check about a bi-radial. A bi-radial should have nearly the same shape furled or unfurled but would have the advantage of aligning the fibers in the direction of stress (diagonally luff to clew) hopefully eliminating any bias stretch...theoretically.
http://img.nauticexpo.com/images_ne/photo-g/25615-454011.jpg I have also found that in my area (middle Chesapeake Bay) my 145 rarely needs furled. We just don't get too many days consistently over 10kts. Something else which may not have come up in discussion is the material used for a padded luff. Many sailmakers default to a foam pad. It is my opinion that these foams collapse and take on a set as a result of being rolled or folded up during storage. Consider asking the sailmaker about using a rope/series of ropes in the pocket instead of foam. FWIW: I'm not convinced that the sailmakers necessarily have your best interests in mind. The sooner your sail fails the sooner they get more business. Here's some reading material from Practical Sailor. https://drive.google.com/folderview?id=0B8pEh5lnvP1yakFDZERscXFTaUE Josh On Tue, Aug 16, 2016, 12:48 PM Rick Brass via CnC-List < cnc-list@cnc-list.com> wrote: > Interesting that you should mention furling. I’ve always considered roller > furling to be about the same as roller reefing. But they are not the same > thing to a sailmaker. > > > > I had a follow up discussion with a sailmaker for Ullman this morning and > we discussed how much I might be reefing the headsail. Recall that I had > planned on a 135 reefable to about 100. He indicated that they don’t > recommend tri-radial construction for a reefing headsail because the shape > advantage disappears. And for coastal cruising and durability, they > recommend using one of the high modulus Dacrons over laminates. > > > > Rick Brass > > Washington, NC > > > > > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Josh > Muckley via CnC-List > *Sent:* Tuesday, August 16, 2016 12:07 PM > *To:* C&C List <cnc-list@cnc-list.com> > *Cc:* Josh Muckley <muckl...@gmail.com> > > > *Subject:* Re: Stus-List Opinions about new headsail construction > > > > There is a third option which you may not have been aware of. Bi-radial. > For a furling sail this might be a good option. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > > > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > like what we do, please help us pay for our costs by donating. All > Contributions are greatly appreciated! >
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