Sail-less sail boat

Discussion in 'Sailboats' started by southbay, Sep 24, 2010.

  1. southbay
    Joined: Sep 2010
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    southbay New Member

    Several years ago, I saw a show that features a fairly large sailboat that had a thick mast, but no sails. The mast was some type of wind turbine or whatever. Does anyone know about that boat, when it happened or its name? Would appreciate any input. You can respond directly to cougarmarineusa@rgv.rr.com
    Thanks
     
  2. jehardiman
    Joined: Aug 2004
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    jehardiman Senior Member

    Flettner rotor, look it up on wiki.

    Edit to add, though wind provided the driving power to the hull, the rotor was driven by a motor, so it is not a true "wind powered" vessel.
     
  3. PAR
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    PAR Yacht Designer/Builder

    Ah yes, the Magnus effect, but the motor used to drive the rotors would have driven the hull faster.
     
  4. jehardiman
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    jehardiman Senior Member

    Not on the Baden-Baden, they were only 37 kW each on a 100m, 2000 ton ship. Now on some of the smaller demo platforms.....
     
    Last edited: Sep 24, 2010
  5. jehardiman
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    jehardiman Senior Member

  6. apex1

    apex1 Guest

    Both wrong, you and (to some extend) jehardiman.

    The power required to drive the Rotor is close to nothing compared with the power provided by the Rotor.

    We have a entire thread here, started by Rwatson a few weeks ago.

    http://www.boatdesign.net/forums/bo...again-flettner-rotor-ship-launched-24081.html

    Regards
    Richard
     
  7. southbay
    Joined: Sep 2010
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    southbay New Member

    Gee! Thanks everybody, especially you, jehardiman. I write articles for magazines regarding boats, boating safety and other stuff. Had a great idea for an article about the evolution of boating since some guy crawled onto a drifting log, up to now. But then it's going into what to expect between now and 2030.
    Again, Thanks!
     
  8. yipster
    Joined: Oct 2002
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    yipster designer

    oops missed most of Rwatsons thread, have to read up
    only showing here the rotor works vertical as well
     

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  9. parrottdesign
    Joined: Dec 2010
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    parrottdesign Junior Member

    Alcyone

    The best example I've seen of this is the Cousteau Society's Alcyone.

    D.
     
  10. Doug Lord
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    Doug Lord Flight Ready

    =============
    Yipster, do you have a link to that unmanned plane?
     

  11. Clarkey
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    Clarkey Senior Member

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