around in pocket, I I think so

Discussion in 'Projects & Proposals' started by WindRaf, Oct 2, 2014.

  1. Angélique
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    Angélique aka Angel (only by name)

    Re my previous post: - Just started a thread about kites on the ocean, let's see what info comes up . . :)
     
  2. Angélique
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    Angélique aka Angel (only by name)

    Good point, big bulbous bows pick up big marine stuff which makes them burn some extra fuel as long as it's there, it only hits the news when they bring a whale on the bulb into port, which is also the first time they hear about it since you can't see it from the ship.

    The same goes for a little boat with a little bulb, however it would only catch the named little stuff, which off course will cause some extra resistance . . .
     
  3. Jamie Kennedy
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    Jamie Kennedy Senior Member

    On a side note of interest, a few years ago they changed the shipping lane for the approach to Saint John Harbour on the Bay of Fundy in order to help protect the Right Whale and other species as it used to pass directly through an important feeding ground. It is my understanding that this has helped to reduce the number of collisions and propeller strikes. This explains it better...

    http://www.rightwhale.ca/shippinglanes-routesnavigation_e.php
     
  4. Westel
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    Westel Senior Member

    Why dont they put something like a "beeper" in the bulb,something the wales are capable of "hearing". There surely must be enough research available to produce a noise of the correct Hz that will attract the attention of the wales.
    No doubt these creatures are intelligent enough to very soon relate that "warning sound" to danger and avoid being around that source of sound.
    With modern technology such a device would cost close to nothing to produce and install.

    Detecting the "beep" means: GET THE HELL OUTTA HERE :D
     
  5. Angélique
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    Angélique aka Angel (only by name)

    It could be big bulbous bows pick up floating whales that are already dead by some other cause.
     
  6. Angélique
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    Angélique aka Angel (only by name)

    Below some links I found when looking for info about bulbous bows on relatively small boats:

    - Thread on this forum: - Bulbous bow on a sailboat

    - Article by George Buehler: - Bulbous Bows ?

    - Article by forum member Tad - Roberts: - Bulbous Bows



    P.S. - Quote from the video uploader: - バルバス 効いてるのかな?
    This is Japanese and means: - Barubasu I wonder if that worked ?
    [​IMG]
    ‘‘Barubasu’’ could mean ‘‘bulbous bow’’ as I see the same Kanji's below the highlighted part in above picture.​
     
    Last edited: Jun 26, 2015
  7. Angélique
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    Angélique aka Angel (only by name)

    Right: - バルバス - = - ‘‘Barubasu’’ - = - ‘‘bulbous’’ - - - - - - - - ・バウ - = - ‘‘bow’’ - :)
    Link
    [​IMG]
     
    Last edited: Jun 26, 2015
  8. Angélique
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    Angélique aka Angel (only by name)

  9. Westel
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    Westel Senior Member

    So much for that idea........:eek:

    Perhaps it might help to prevent them from being hit by the propeller....?
     
  10. Angélique
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    Angélique aka Angel (only by name)

    Hi WindRaf,

    Just spotted the new plywood model on your website, looking forward to the data.

    Is this a change of plan from steel to plywood or only a thought experiment ?

    Good Luck !
     
  11. WindRaf
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    WindRaf Senior Member


    no, it's a design on request
     
  12. Angélique
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    Angélique aka Angel (only by name)

    Hi WindRaf,

    Just spotted another new model on your website, looking forward for the data.

    Is this a change of plan to go with two persons, and is this a steel design ?

    For "Fionda" I found "sling" or "slingshot", does it also mean "swing" or "change", or what is the correct translation ?

     
  13. WindRaf
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    WindRaf Senior Member

    Angélique,

    It is a new design 14 ft, on client request, in plywood;

    the translation of the name 'fionda' is slingshot.
     
  14. Angélique
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    Angélique aka Angel (only by name)

    The tumblehome (inward falling top sides) decreases the righting moment in a knock down, so the boat easier rolls further to a complete inversion.

    On the positive side, the tumblehome also decreases the boat's inverted stability, so wave impact knocks her easier back on her feet, but this requires that the boot is sealed and all mass securely fixed when this situation occurs.
     

  15. Angélique
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    Angélique aka Angel (only by name)

    For your steel designs, found below a trick how Grahame Shannon saved weight on his 23' 10" (7.26m) steel Tom Thumb design, which plans are now marketed by Bruce Roberts . . . .

    Blue Water Boats ---> List ---> Tom Thumb 24
     
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