35th Americas Cup: Foiling Multihulls!

Discussion in 'Multihulls' started by Doug Lord, Sep 26, 2013.

  1. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  2. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  3. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  4. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

    35th America's Cup on Foils-- Team France

    Martin Fischer on why Team France has a different foil on each hull:

    http://www.catsailingnews.com/2017/03/groupama-team-france-launches-last-ac50.html

    Excerpt:


    The foils are made up of two elements.
    The upper section of the appendage called the SHAFT
    The lower section is called the TIP.
    The junction between the two is called the elbow or knee.
    The class rule imposes a maximum number of Shafts and Tips:

    On the training boat, the team can build 6 Shafts and 12 Tips
    On the AC Class, just 4 Shafts and 8 Tips are permitted.
    The lower section, the Tip, must not represent more than 30% of the foil weight, but its length is not restricted.

    "Groupama Team France, like its rivals, is adapting the foils according to the wind ranges and is building two types:

    Foils for light to medium airs, whose Tip is longer
    Foils with a shorter Tip, optimised for higher speeds

    Martin Fischer: “The rule does not require the boat to be configured symmetrically when racing. As a result, our port and starboard foils can be different. This is an interesting element, because when you run the race simulations, you notice that the course is not symmetrical. There’s more emphasis on starboard tack than port tack. There are two high-speed reaching legs on starboard tack.”
    ...




    Picture by Austin Wong:

    [​IMG]
     
    Last edited: Mar 15, 2017
  5. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  6. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  7. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  8. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

    35th America's Cup on Foils!--Noteworthy Trickledown

    From Scuttlebutt Europe and Seahorse Magazine--excerpt:

    (Noteworthy) Trickledown
    It's not all about solenoids, actuators and electronic feedback... Harken's Air Winch is one of the exciting early spin-offs from America's Cup 2017
    Much has been said about how the new multihull America's Cup has not contributed much to the development of mainstream big boat racing, and this is not untrue: very little of all that clever work that went into spar, sail and boat design and fabrication over decades of Cup racing is being developed any longer to produce a trickledown benefit for the larger racing audience that still enjoys monohull racing. However, there is one supplier to the AC programmes who has been consistently adapting to the new platforms and tenaciously innovating to find solutions, and some of these ideas have proved to offer tangible benefits to the broader racing public: Harken.
    A lot of focus has been placed on faster hydraulic systems to transfer energy in the controls on AC foil and wing systems, and Harken is a clear leader in this field. Yet Harken has also been active on more traditional line-handling systems, of which the Air Winch is one of the most significant innovations (Air Winch was a category winner at the 2016 Dame Awards - the most important competition for new concepts and designs in marine equipment).
    Developed to handle the single 'mainsheet' to the wing on the AC50, the Air Winch had to deliver a light, strong, reliable and versatile all-inone package. 'During the last Cup the teams used different models of our winches for the wing - a sure sign there was an opportunity to develop a dedicated winch for wing trimming,' said business director Mark Wiss.

    Full article in the April issue of Seahorse:
    www.seahorsemagazine.com
     
  9. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  10. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  11. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

    35th America's Cup on Foils! Artemis

    Artemis nose down:

    [​IMG]
     
  12. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  13. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  14. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

    35th America's Cup on Foils! TNZ (on April 1st)

    From Scuttlebutt Europe:

    Have The Kiwis Mastered Anti-Gravity?

    Spying on other teams is as old a tradition as the America's Cup itself. But never has a surreptitious photograph so shocked the world of performance sailing as the one shown at right(see below). It appears to show the Team New Zealand ACC foiling... while standing completely still.
    The photo, circulated by an unnamed member of ORACLE, is visual confirmation of rumours swirling around Auckland docks and the physics department at the University of Woolamaloo.
    "Those cyclists in the hulls? A lovely little distraction, that. Kept the entire membership of SINS blathering away for weeks while the real breakthrough was right in front of their eyes" said Professor Bruce B. Bruce. "If nautical journalists in Auckland had held off on the gin until after lunch, just once, they might have noticed that the height of TNZ hulls above the water never varied once they rose from the surface... regardless of wind strength or direction. And that the hulls dropped right down even when the wind did not and sail trim did not alter. Hullspeed hasn't a bloody thing to do with these foils. Gravity waves and quantum entanglement are what's going on."
    Scuttlebutt Europe has independently confirmed sightings of the hulls rising and falling at the dock, in one instance when the rig wasn't even stepped on the hull. Swarms of dockhands staring into tablets and clutching clipboards are an unusual enough sight... more so when they're clad in lab coats and pocket protectors. "Don't look much like the usual BNs" muttered the ORACLE source.
    "We aren't going to need a lot of practice time in Bermuda" smirked syndicate head Grant Dalton.
    "We've got a few tricks up our sleeves and are confident that we'll leave with the Auld Mug in hand. We expect the usual squealing and whinging from our vanquished competitors. Looking forward to not giving a single flying feck".


    [​IMG]
     

  15. Doug Lord
    Joined: May 2009
    Posts: 14,291
    Likes: 124, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.