Subject: Re: SoftWing
From: Mike Crawford
Date: 11/29/2014, 8:46 PM
To: "harryproa@yahoogroups.com.au" <harryproa@yahoogroups.com.au>


  I have no idea about the price.  I imagine it's not cheap because it's a high-tech sail still in the development stage.

  However, since we just got the roof sheathing on our new house, right before Wednesday's snowstorm up here in Maine, the SoftWing price doesn't stress me.  

  It's going to be a while before I have to worry about which sail to actually get (house is notably over budget already), and by that time the solution looks like it will have worked itself out.

  I'd probably skip the reinforced (carbon?) mylar sails and go with dyneema.  That should cost a lot less, be essentially impervious to UV, be very tolerant of wrinkles while stowed, and shouldn't pose the same creep-stretch issues that a more highly-stressed single-skin sail would experience.

---

  The worst case would probably be to go with fewer/larger/thicker frames, like Pha or Matin Blue, instead of a greater number of lightweight frames like softwing.  Most of the work could probably be done at home, particularly if you have a sailmaker CNC-cut the panels ahead of time.

  And if you go with a single mast, you could make some good arguments for going with a junk rig with multiple mainsheets instead of a softwing with a boom under stress.  

  It's also important to note that Pha went faster and pointed higher than a standard Tiki Wharram soft wingsail rig, which according to James Wharram's experience went faster and pointed higher than a Bermuda-rigged Wharram.  That's a pretty good worst case.

---

  But I still like to drool over that SoftWing.  It's got a beautiful foil shape that would look just perfect on a modern proa, and I like that it's got many lightweight tri-segmented frames positioned more closely together than the junk/wing rigs I've seen.  I could see that working nicely at high speeds, albeit with a bit more stress.

  I'm guessing that we'll see some nice progress over the next few years now that Beneteau and Softwing are busy testing their products.  Even if SoftWing doesn't come up with a decent sail price or licensing fee, someone's likely to refine a design and make it competitive with standard high-tech sails.

       - Mike


On Nov 28, 2014, at 1:06 PM, "Gardner Pomper gardner@networknow.org [harryproa]" <harryproa@yahoogroups.com.au> wrote:

 

That looks very interesting. Have you seen any indication on pricing? The idea is cool, but if the sail costs more than the boat, I don't want to tease myself.

- Gardner


On Wed, Nov 26, 2014 at 2:47 PM, Mike Crawford mcrawf@nuomo.com [harryproa] <harryproa@yahoogroups.com.au> wrote:
 


  More updates on the SoftWing sails:

    http://www.voiles-alternatives.com/viewtopic.php?f=3&t=336
    https://www.facebook.com/media/set/?set=a.284279928416094.1073741829.169341956576559&type=1
    https://www.facebook.com/pages/KISS-Multihull-AB-T29/511834502238630

  They have been testing what they are calling the V14 sail on a T29 trimaran with what appears to be a 12m stayed mast.

  The sail is not yet optimized, particularly for reaching, but they did say they can point ten degrees higher than a Farr 40, while moving faster, tacking through 60-65 degrees. 

  And that's on a 9 meter 1200 kg trimaran with an upwind SA/D of 58, not a 12 meter 700 kg proa with an upwind SA/D of 70 to 90 (depends upon the mast)!

  It's exciting to see the tests with a larger sail.  The T29 might only have a 12 meter mast (estimating from photos), compared to BL's 18+ meters, but that's still a more useful example than the earlier tests with the smaller boat.

  My dream of someone else doing all the hard work of developing a reefable wing sail that lets me use a fixed mast is slowly coming true.

        - Mike



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Posted by: Gardner Pomper <gardner@networknow.org>
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