Daggerboard Vibration

Discussion in 'Sunfish Talk' started by Craig S., Apr 29, 2012.

  1. Craig S.

    Craig S. New Member

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    My daggerboard vibrates in moderate wind and water conditions. Is there a "fix" ?
  2. beldar boathead

    beldar boathead Active Member

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    Assume it is a wooden one? I don't think the plastic ones vibrate. I don't know what to do to fix it - seems sometimes some vibrate and some don't. Maybe someone else will have had luck solving that problem - short of buying a plastic board.
  3. Craig S.

    Craig S. New Member

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    thanks, yes it is wooden. I had read @ one time about some sort of dampening sleeve that could be added to address?
  4. brianZ71

    brianZ71 Member

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    Mine does it when going downwind. Not a big deal, but you can pull it up. You don't really need it when running.
  5. Alan Glos

    Alan Glos Active Member

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    Get two strips of very thin indoor/outdoor carpeting and glue the strips lengthwise in the daggerboard trunk near deck level with some contact cement. These strips will make the board
    fit in the trunk with less play and will prevent the vibration.

    Alan Glos
    Cazenovia, NY
  6. Craig S.

    Craig S. New Member

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    Thanks fo
  7. Craig S.

    Craig S. New Member

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    Thanks for the heads up, I will give it a shot.
  8. signal charlie

    signal charlie Active Member Staff Member

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    It's happy, let it hum :)
  9. Sailkb

    Sailkb Member

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    I'm with you. Mine (wooden board) happens to vibrate more on a reach or even up wind. Unless it is a symptom of significant less efficiency, I kinda like the company.
  10. mhirte

    mhirte New Member

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    I like to think of it as a speedometer. It makes me smile.
  11. Michael Owen

    Michael Owen New Member

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    Hi Craig. I have the same problem with a dagger board I made. It appears that the leading edge is too much of an angle and is acting like a reed in a wind instrument.
    The other possibility is that it is too sloppy in the hull or the spring is missing. Maybe a small wedge would help.
  12. sailyor

    sailyor Member

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    There is usually nothing wrong with some good daggerboard hum. It usually happens when you get up to speed, and it's common in a lot of boats.

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