Hinged Bruce Foil Proa

Discussion in 'Multihulls' started by Manfred.pech, May 7, 2013.

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  1. raf pali
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    raf pali Junior Member

    The sliding hinge is smart. Taking the foil back, compensates for the drag it produces which, if in the center, would be responsible for an excessive weather-helm.
     
  2. proagenesis
    Joined: Jun 2013
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    proagenesis Junior Member

    ...... well ..... shure !

    but why not just add a wind ward sail ?
    to balance the whole thing with out moving any thing ....

    no hvf ... no mast .... wouldnt this be better for a big boat ?

    http://www.proadesign.com you can even add a bigger wws
    or add a spreader to making the stay vertical
    then you dont need any roller jibs !

    regards proagenesis

    .
     
  3. raf pali
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    raf pali Junior Member

    A windward sail and jibs makes it more complicated than shifting the foil to the right place and use a traditional latin rig. To go any further with rigging types we have to establish a SOR.
    Cheers
     
  4. proagenesis
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    proagenesis Junior Member

    ..... this shifting will be working ok in a model size .....

    but we are not designing models > but real boats >
    so could you be telling me ???

    how this will be working on a 100' ?
    with out all those problems associated .... like the AC boats have
    meaning to making a beach cat 72' long .....

    we are designing a whole some boat type here !
    no contraptions .....

    besides .... having more then one sail >
    meaning to have the neccessary self steering capability for cruising .....

    and a faster change of directions !


    regards proagenesis

    .
     
  5. proagenesis
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    proagenesis Junior Member

    one more question .....

    ..... what disadvantage will we have ....
    if we make this lee ward side straight from > station 1 to 9 ?
    or more nearly so ....


    regards proagenesis


    .
     
  6. proagenesis
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    proagenesis Junior Member

    the cruising proa

    hello ....

    I have been sooo immersed in the design of the hvfp >
    that I had forgotten ..... that there be a lot of people >

    having not the faintest idea of what we are doing here >
    this is not about racing around in circles ever faster !

    but imagine > sailing on over the ocean for weeks
    to be traveling to a new destination ......

    and there you come to the conclusion >
    that you will be needing a whole different boat design

    like no planning hulls > no short enough boat to fit into a slip !
    but to having as long a hull as possible > and being as steady going .....

    you will be needing a hvfp > http://www.proadesign.com

    regards the team of proagenesis

    .
     
  7. proagenesis
    Joined: Jun 2013
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    proagenesis Junior Member

    plan for the hvfp

    .

    plans for the vector fin proa >
    as well as the basis of the hinged vector fin proa >
    can be looked at >

    http://plan.proadesign.com/


    .
     
  8. El_Guero

    El_Guero Previous Member

    Proagenesis,

    I was on your team until post #12.

    I do not like your proposal.

    Wayne
     
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  9. proagenesis
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    proagenesis Junior Member

    ..... well wayne ..... any time you want to tell us all >
    what " proposal " you dont like ....

    you are welcome !

    because I cant see any thing wrong in post '#12 !
    after reading it .....

    regards the team of proagenesis


    .
     
  10. proagenesis
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    proagenesis Junior Member

    tom speer profiles

    hello .....

    I have taking the liberty ..... to modify a .... good .... section from tom speer
    after thinking about 2 way section ... priorities .....

    you can see it as well at http://www.proatech.org > 2 way profile
    it has a sharp edge from the pressure side > and towards the ww side a continually greater radius .....
    as shown in the red out line !

    what do you think about it > and can any one test it ... in his computer program ?
    we will test it soon in reality ......


    regards proagenesis


    .
     

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  11. El_Guero

    El_Guero Previous Member

    Both statements are partially true in some circumstances.

    Many of your statements are partially true. But, you express your statements as if they are always true and your application of technology is a remarkable breakthrough.

    The problem is that your application of foil technology is not a breakthrough, nor is it remarkable.

    IMHO.

    But, like you said, you have been using your apparatus for over 20 years. So, you have encountered any reasonable risk, overcome those risks, and can justify the risks to yourself. Even if you cannot justify your risks to me.

    Wayne
     
  12. El_Guero

    El_Guero Previous Member

    How will you test this?

    What is your metric for success or failure?

    Just looking at the foil, it is in need of serious work.
     
  13. raf pali
    Joined: Mar 2012
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    raf pali Junior Member

    Here ya go, foil heads!
    This is the foil profile that will keep the thing in balance to the wanted depth. O is the hinge; B is the water line. AB = ab; AC = aC; OA and Oa are mirrored at OC plan.
    The best section for it, at my opinion, is a natural parabola. Just stretch a chain until satisfied with the ratio Width / thickness.
    Good luck with that.
    Cheers.
     

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  14. proagenesis
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    proagenesis Junior Member


    ...... bft 10 and white squals are there for every one !
    not just myself >

    I have been out there > when the pilot boat had problems .....
    so what are you up to ?
     

  15. proagenesis
    Joined: Jun 2013
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    proagenesis Junior Member


    ..... well ..... do you have any arguments for a better ?
    or the other way around > what are your objections ?



    .
     
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