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  1. S

    Canting keel forces

    After all of our hard work.. just wondering why they don't use the hydrolic system to move the keel, then a physical lock / bolt (would be a big one though) to lock the keel in position.. surely this would mean that the hydrolics are used only during tacking and gybing.. not a huge amount of...
  2. S

    Canting keel forces

    Thought just hit me..... 'by Jesus - if they have set up a resonant system with the pressures and forces involved, these systems are literally going to be 'bombs' waiting to go off..... explains an awfull lot :ph34r:
  3. S

    Canting keel forces

    I reckon 'Galloping Gerty' stikes again.. wonder if the engineers have considered or run similar analysis.... would be great to have a SA'er who is a crew to comment..... on the sounds and if they dare touch the structure when going... Although I wouldn't.. :ph34r:
  4. S

    Canting keel forces

    Luckily to this point we have not heard of any unstable hydrodynamics for the keel fins. Being made of a single shaft of steel this is highly unlikely. It would also not be something unique to canting keels, so the issues would not be new. As for wave propagation in the hydraulic system, I...
  5. S

    Canting keel forces

    Sucky, would that be Galloping Gerdy you're referring to? If so, it's the Tacoma Narrows Bridge. Thanks B2S... Some similarities here I think, "The first Tacoma Narrows Bridge was revolutionary in its design and historic in its collapse. The failure on November 7, 1940 marked the end of a...
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    Canting keel forces

    And I reckon there will be 'harmonics' to deal with aka. the Tahoma bridge... wonder what is the natrural frequency of a V70...... hums a bit on the Vids, perhaps the keels are shaking themselves to bits.. wonder if thats in the calcs...
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