Epoh-Skiff Trainer with "Stabilizers"

Discussion in 'Sailboats' started by Doug Lord, Mar 3, 2016.

  1. Doug Lord
    Joined: May 2009
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    Doug Lord Flight Ready

  2. upchurchmr
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    upchurchmr Senior Member

    Now those really are training wheels.
     
  3. luff tension
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    luff tension Junior Member

    What a complete waste of time, why not just go down the trimaran path and get more performance
     
  4. daiquiri
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    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    Indeed. Or just add amas with high SLR or L/B ratio - they won't create such a radical slow-down and yaw upon touching water (1:55 of the video).
     
  5. Doug Lord
    Joined: May 2009
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    Doug Lord Flight Ready

    Epoh

    Slavi, I watched the video at the point you referenced 4 times and didn't see anything resembling a "radical slow down"? The design of the amas seems to allow for a lot of dynamic lift.
    The boat is not a trimaran and is not designed to be sailed "on" the amas-they are there specifically -and only-to prevent capsize. And they are easily removable when you graduate from the trainer version.
    I think the boat is an innovative design that could help beginners get the hang of skiff sailing before they get frustrated by inadvertent capsize.

    At the very end of this newer video is a bit on the "stabilizers"-you click on the upper right corner.
    https://www.youtube.com/watch?v=yMVgPRG0oPY
     
  6. daiquiri
    Joined: May 2004
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    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    Yes, I do admit the word "radical" is too radical. :)
    But it was referred to the sudden yaw induced by the ama drag. IMO it would be much softer with non-planing and high-SLR amas, but I might be wrong of course.
     
  7. Doug Lord
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    Doug Lord Flight Ready

    Slavi, a clue to the design of such "amas" can be found in the history of Hydroptere: her original amas were displacement hulls and designed for intermittent water contact-they were not designed to be "sailed on".
    They didn't work too well and the later amas were stepped planing hulls which makes sense since contact would most likely occur with the boat at speed.....

    click for best view:

    left is the original ama, right is the later version-
     

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  8. daiquiri
    Joined: May 2004
    Posts: 5,373
    Likes: 252, Points: 93, Legacy Rep: 3380
    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    Good info, Doug. Thanks. :)
     

  9. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    Epoh

    You're welcome....
     
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