34th America's Cup: multihulls!

Discussion in 'Multihulls' started by Doug Lord, Sep 13, 2010.

  1. cavalier mk2
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    cavalier mk2 Senior Member

    I'm thinking they did it to reduce bow lift and keep the nose slicing the water.....very much a raptor.
     
  2. Corley
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    Corley epoxy coated

  3. Doug Lord
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    Doug Lord Flight Ready

    34th AC

    Geez! I saw the L foil on the stb side and the port hull was almost flying yet not one mention of foils in the article!! Yes, James this is a tremendous achievement-the FIRST foiling Americas Cup boat in the history of mankind.
    Once again the Kiwis lead the world of sailing!
    Gary, I didn't know you were working for TNZ- you must be.
    I can't believe I missed this and that no one in the media understands what they are looking at. Fantastic!


    Picture: The usual suspects claim this is a photoshopped picture including the so-called "editorial" staff on SA:
    update: comment from Maganus(Canadian C Class team and former TNZ member) :
    " Do you guys actually believe they would spend the time to PS this ****? really?
    Does each team shadow the other guy with a chase boat when they are training? Of course they do, so how much is actually hidden? So you really think they spend all this time PSing to throw the other guy off the scent? I don't think so.
    It is what it is, they're foiling!
    B "
     

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  4. Doug Lord
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    Doug Lord Flight Ready

  5. Corley
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  6. gypsy28
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    gypsy28 Senior Member

    Is the A frame on the bows of Oracle just to hold the prodder up whilst the rig is off or will that stay?

    DAVE
     
  7. Silver Raven
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    Silver Raven Senior Member

    Gooday Doug, Corley & Gary. Thanks for the video links Corley.
    Doug - just ignor - 'wet-noodles' & 'mo-bike' following the lowest common denominator to - way below the bottom - has no gain - just ignor them. Regardless of Paul's opinion - he's at least honest enough about that it's his opinion & not trying to shove it down our throats. He's just making a statement. I respect his right without agreeing with him, allowed - I'm sure.

    While I dissagree with his - evaluation of 'match racing' - - again he's not telling me that every other way is wrong - just not his evaluated way (sorry if the grammer is wrong) - that's fine - - I'm sure he'd be the first to agree that I'm allowed to have another view of 'match racing' which I've done for over 40 years now & in about 10 different classes - mono & multi. Just because one decides to cover tack or split tacks - doesn't make it not - match racing.

    Wonder what 'Cav' would think of cruising a ORMA 60' - cruising version - up the 'Inland passage' & the whole of the coast of the Pacific NW ??? WOW - a pair of them 'cruising' in those waters - would just be a total blast - for sure. Would sure allow enough time to explore a lot of the wonderful areas ashore & say hello to all the great people & bears/beavers - eat salmon & have a few 'sundowners'.

    Fun times guys - do enjoy & great sailing to all. ciao, james

    Gary - what about that aft beam on the American AC - great foil shape - what about fitting a 'flap' into the middle of it - to controll the amount of lift or down force - sure might help balance the for & aft of the hulls - especially when the bows are being pressed - when going - off-the-wind ???

    Very interesting times - for sure. Imagin - 72's out of the water - who'd-'ave-thunk-it ??? WOW.
     
  8. cavalier mk2
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    cavalier mk2 Senior Member

    I'm like everyone James, cruising a ORMA 60 in the PNW sounds like a blast. The often light airs of the inland passage would welcome the sail area. The challenge of course would be maneuvering through the tight spots at speed. The Nicol can get through some things that would definitely be tight with the 60. Now who's buying?
     
  9. Corley
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    Corley epoxy coated

    It looks temporary and just a means of resisting dolphin striker tension I guess we will find out soon once they step the rig. Seagull strikers do exist for cat front beams but would seem to be a draggy solution on such a high tech and otherwise clean platform.
     
  10. yves
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    yves Junior Member

    Wow, if enough winds to be on its foils, that will be a no race in case the others don't get some (but I guess they can still add them), what do the rules state exactly ? Only out dimensions and sail area ? Nothing about the appendages ?

    Edit, quite precise in fact :

    Considering that on the hydroptere, the trimming of the horizontal plane on the rudder seems to be one or the key point, might be the critical aspect there (as it is forbidden in the AC72 rule)
     
  11. Doug Lord
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    Doug Lord Flight Ready

    ---------------------
    But whats not prohibited is pivoting the daggerboard fore and aft in its lower bearing(primary load bearing support). Doing that manually would allow altitude control.
    This picture illustrates that Oracles boards pivot-best illustration I've seen yet:

    click-
     

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  12. Doug Lord
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    Doug Lord Flight Ready

    34th AC

    Comment by Julian Bethwaite on DA in the "Flapper or gyber" thread regarding AC trickle down technology:

    "None of us pay anywhere near enough attention to this arena. I look forward to the advent of foiling AC's and the wash down effect to all of us.Cant attached the photo, its too big. I will get one of my sons to reduce it and then post it, maybe a few, great stuff.

    Julian
    Sydney (mostly) "
     
  13. yves
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    yves Junior Member

    Yes indeed, but I guess that will make it much more sensible for controlling the horizontal angle of the hull, will be interesting anyway ! :)
     
  14. Doug Lord
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    Doug Lord Flight Ready

    ---------------
    With the main foil's angle of incidence being controlled manually(if at all) and the rudder foil fixed, pitch control will be good. They aren't allowed to use the windward foil to pull down and create more RM.
     

  15. groper
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    groper Senior Member

    Have a look at the ETNZ day 4 video, at 1:07 there is footage of the boat flying the windward hull, and the leeward hull is barely touching the water! they obviously have plenty of lift from that foil...
     
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