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#1
posted to rec.boats.cruising
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Laminate Sails
I just bought a Genoa and Main from a "known" sailloft. The sails have
are built with this layered construction: 1. Scrim protective surface 2. Mylar 3. Fiber reinforcements 4. Scrim protective surface Both sails have built in wrinkles or buckles in areas that I believe are due to not having everything flat when assembling or drying the glues. Also the genoa is on a furler and the inside layer (as rolled up) seems to have buckled in small ripples away from the laminate since I first put it on. These ripples are 1/16 or so high in some areas of the sails. How common is this? Should I be concerned? What does it do to the performance? |
#2
posted to rec.boats.cruising
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Laminate Sails
On 2008-06-22 14:01:16 -0400, thudbranch said:
I just bought a Genoa and Main from a "known" sailloft. The sails have are built with this layered construction: 1. Scrim protective surface 2. Mylar 3. Fiber reinforcements 4. Scrim protective surface Both sails have built in wrinkles or buckles in areas that I believe are due to not having everything flat when assembling or drying the glues. Also the genoa is on a furler and the inside layer (as rolled up) seems to have buckled in small ripples away from the laminate since I first put it on. These ripples are 1/16 or so high in some areas of the sails. How common is this? Should I be concerned? What does it do to the performance? That doesn't seem right. What's your sail loft say? In my experience, buying a sail often/usually includes their sailing with you to see if they got it right. I'd expect it with a high-tech sail. -- Jere Lull Xan-à-Deux -- Tanzer 28 #4 out of Tolchester, MD Xan's pages: http://web.mac.com/jerelull/iWeb/Xan/ Our BVI trips & tips: http://homepage.mac.com/jerelull/BVI/ |
#3
posted to rec.boats.cruising
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Laminate Sails
In article 200806221525398930-jerelull@maccom,
Jere Lull wrote: On 2008-06-22 14:01:16 -0400, thudbranch said: I just bought a Genoa and Main from a "known" sailloft. The sails have are built with this layered construction: 1. Scrim protective surface 2. Mylar 3. Fiber reinforcements 4. Scrim protective surface Both sails have built in wrinkles or buckles in areas that I believe are due to not having everything flat when assembling or drying the glues. Also the genoa is on a furler and the inside layer (as rolled up) seems to have buckled in small ripples away from the laminate since I first put it on. These ripples are 1/16 or so high in some areas of the sails. How common is this? Should I be concerned? What does it do to the performance? That doesn't seem right. What's your sail loft say? "It'll ride up with wear" :-) -- Molesworth |
#4
posted to rec.boats.cruising
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Laminate Sails
On Jun 22, 11:01*am, thudbranch wrote:
I just bought a Genoa and Main from a "known" sailloft. ... Both sails have built in wrinkles or buckles in areas that I believe are due to not having everything flat when assembling or drying the glues. *Also the genoa is on a furler and the inside layer (as rolled up) seems to have buckled in small ripples away from the laminate since I first put it on. * These ripples are 1/16 or so high in some areas of the sails. *How common is this? *Should I be concerned? *What does it do to the performance? I'd be concerned. You're being coy, but I presume we're talking N****'s M******* *DL sails. I'm going to work on that assumption. I'm also going to assume that the problems you are describing are in the body of the sail and not at the reinforcements or UV covers. In any case, these are premium rags and you should get perfect sails and are justified in demanding first rate support. As you probably know, these sails are made on a mold using a vacuum bag for clamping. Although there are some advantages to this technique it has potential drawbacks as well. It is possible that the buckles in the laminate are the result of a misplaced bag or breather or leaks or poor vacuum control. Even when it all works as planned the *DL laminate is thick when compared to laminates made in flat sheets under higher pressures. This puts sheer stress on the outer layers (taffeta) than you'd have in a paneled sail with similar components when you roll it up and may be a particular problem with M******* sails as they have extra taffeta layers. The ripples you're seeing on the roller sail could be a result of too much stress either because the panel is thinker than designed (ie. built w/poor vacuum) or a glue failure. There are more benign possibilities, but I'd make some phone calls and take some pictures right away. Even if these are paneled hi-tech sails I'd get them looked over. What you are describing is not expected behavior in new laminate sails. -- Tom. |
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