New boat from Kotaro Horiuchi

Discussion in 'Boat Design' started by Guru, Dec 27, 2012.

  1. Guru
    Joined: Apr 2007
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    Guru Honyakusha

    Kotaro Horiuchi, the grand old man of small boat designs in Japan, has come out with a new offering - a small boat that does 19 knots with a 2 HP outboard. See the photo attached. The boat is about 3.3 m long, and will be exhibited at the Boat Show in Tokyo in the beginning of March, 2013.

    He is well over 80 but still takes part in canoe competitions all over the world and coming up with new designs of small boats.


    Gururaj
    Ex-Naval Architect/Translator
    honyakusha@gmail.com
    http://cli.gs/ttech
     

    Attached Files:

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  2. Ad Hoc
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    Ad Hoc Naval Architect

    If he ever pops down to Kobe harbour, i'd love to have a go :)
     
  3. Manfred.pech
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    Manfred.pech Senior Member

    Thank you Gururaj for the very interesting news. Working with Google I found fascinating experiments of the great KH with a catamaran and trimaran: http://www.youtube.com/watch?v=g7RSZX1GA5A
     
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  4. Doug Lord
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    Doug Lord Flight Ready

    -----------------------------
    Thanks for the update about Kotaro and the boat-looks like fun! I treasure Kotaro's book that I got a couple of years(or so) ago. What a great guy!
     
  5. Guru
    Joined: Apr 2007
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    Guru Honyakusha

    Incidentally, I have started translating chapters of his first book (LOCUS OF A BOAT DESIGNER - in Japanese) on my own. This book is also a treasure-trove of information, and I'd like non-Japanese readers to read it.
    Gururaj
     
  6. Manfred.pech
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    Manfred.pech Senior Member

    Though I do not know enough about hydrodynamic foils, the Catamaran design of Kotaro Horiuchi seems to me worth to be discussed. The boat is to be steered following the canard principle by the vertical parts of the front foils by an ingenious system. I think KH choose this solution to enlarge the distance between the foils for longitudinal stability (compared to the Moth solution with an extended after foil/rudder fixing).

    The hulls can move independently around the foreward beam to give the foils more room for an individual optimal position in the water by the sensors and allow free pitching. Therefore the mast with its aluminum struts is not stayed rigid but can move with the independent motion of the hulls.

    The bows are very interesting with their hydrodynamic ski like front foils to prevent sudden nose diving tendencies by negative lift from the T-foil. The after foil can be moved fore- and backward and the angle of the foil can be adjusted. Folded back the tire comes down to beach the cat.
    I am surprised by these solutions aside the main stream of small catamarans but I´m curious about a contest with other beach cats. The video looks indeed very encouraging.

    [​IMG]


    http://www.youtube.com/watch?v=g7RSZX1GA5A
     
    Last edited: Dec 31, 2012
  7. boatmodo
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    boatmodo New Member

    Guru, When you're done translating the book I'd love to read it. Thanks.
     
  8. beachcraft
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    beachcraft Junior Member

    Can it get to shore or do you have to keep it tied up in a couple feet of water?
     

  9. Manfred.pech
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    Manfred.pech Senior Member

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