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Thread: Inflatable sail on telescopic mast !

  1. #1
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    Default Inflatable sail on telescopic mast !

    Swiss made. Dunno if it was already posted here.

    https://youtu.be/QGJ02kEDtXI

    And their Web site

    http://inflatedwingsails.com/en/concept/
    Last edited by Rapelapente; 04-15-2018 at 12:22 PM.
    Gerard.
    SCHOONER FOR EVER, GOELETTE A PERPETE

    http://www.schooner-anthea.com

  2. #2
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    Default Re: Inflatable sail on telescopic mast !

    Thanks. Very cool!

  3. #3
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    Default Re: Inflatable sail on telescopic mast !

    It uses little fans in the luff to create the pressure.

  4. #4
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    Default Re: Inflatable sail on telescopic mast !

    That's an amazing design.



    Wonder how they'll match up against conventional fabric sails, or rigid wing sails? Being able to douse the sail and lower the mast would be a great advantage in offshore sailing.
    We're merely mammals. Let's misbehave! —Cole Porter

  5. #5
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    Default Re: Inflatable sail on telescopic mast !

    In the last vidéo it compares to a normal laser.
    No real datas given though.

    http://inflatedwingsails.com/en/category/video-en/
    Gerard.
    SCHOONER FOR EVER, GOELETTE A PERPETE

    http://www.schooner-anthea.com

  6. #6
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    Default Re: Inflatable sail on telescopic mast !

    The previous laser prototype had only one vent at the "boom" level.
    Gerard.
    SCHOONER FOR EVER, GOELETTE A PERPETE

    http://www.schooner-anthea.com

  7. #7
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    Default Re: Inflatable sail on telescopic mast !

    Appears to be a symmetric wing. If so that would limit it's efficiency quite a bit.

    Another "new" sail idea, essentially a balanced lugsail hung in an A-frame mast:



    More on this one here.
    -Dave

  8. #8
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    Default Re: Inflatable sail on telescopic mast !

    My second paraglider was one from Laurent de Kalbermatten.
    Very efficient wing. At that time he was building the best.
    The same featured in this video

    Last edited by Rapelapente; 04-15-2018 at 04:12 PM.
    Gerard.
    SCHOONER FOR EVER, GOELETTE A PERPETE

    http://www.schooner-anthea.com

  9. #9
    Join Date
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    Default Re: Inflatable sail on telescopic mast !

    Quote Originally Posted by Rapelapente View Post
    In the last vidéo it compares to a normal laser.
    No real datas given though.

    http://inflatedwingsails.com/en/category/video-en/
    The normal Laser is also being sailed poorly. We know what the vang and mainsheet settings on a standard Laser should be for those conditions, and we know what angle of heel the Laser should be sailed at. The normal Laser doesn't have enough vang or mainsheet and it has too much heel. A Laser sailed like that would be about 4-5 minutes behind a good Laser in a typical race. It's hard to make out because there are gusts and shifts, but it appears that the poorly trimmed standard boat is no slower than the wing.

    The site claims that the fact that the wingsail can be gybed with the leach going forward is a good thing, but anyone who has ever sailed a Laser or a longboard windsurfer will know that it's actually got major drawbacks.

    There's also no reason why a wing should be faster. Over on Boat Design Forum, Tom Speer (Boeing wing designer and Team Oracle America's Cup wing designer) and Professor Mark Drela (MIT aerodynamicist, world champ wing and foil designer and America's Cup wing designer) have both pointed out that wings are NOT inherently more efficient than normal thin sails. Wingsails seem to be the most over-hyped development in sailing.

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