AC 36 Foiling Monohulls

Discussion in 'Sailboats' started by OzFred, Sep 13, 2017.

  1. OzFred
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    OzFred Senior Member

    The AC75s will be much faster than a canting keel boat in conditions that they can foil in, which seems to be anything above about 10kn of wind (based on the limited information available from online videos of the roughly half–size scale model test boats). I'm sure they could make that lower if they wanted to.

    Compared to a 75' canter, the AC75s are significantly lighter (they're about the same weight as an IMOCA 60, around 7,500kg) and have very little wetted surface. They can potentially do well over 50kn, but whether they do that in racing will depend on many factors. Winning a race isn't about pure speed, it's about who gets around the course faster, there are many factors involved. :)
     
  2. OzFred
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    OzFred Senior Member

    It seems the Columbus 2021 challenge is out of the cup as a non–starter: Niente Columbus alla Coppa America

    No Columbus at the America's Cup
    by Gian Luca Pasini
    Columbus 2021 will not enroll in the America's Cup, the second Italian Cup challenge presented in Imperia a few weeks ago, has not yet formalized the registration and will hardly do it from here to the deadline.

    Translation courtesy of Google Translate.

    The deadline for late entries is 30 November, 2018 so it seems there will only be 3 challengers:
    1. Luna Rossa
    2. American Magic
    3. INEOS Team UK
     
  3. OzFred
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    OzFred Senior Member

    There are rumours of a Dutch entry to AC 36, with the Royal Netherlands and Royal Maas Yacht Clubs mounting a joint challenge. Only two days to the nomination deadline (30 November) so I guess we'll know if it eventuates shortly…
     
  4. OzFred
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    OzFred Senior Member

    More details on the possible Dutch entry on Zeilen: Nederland gaat voor de America’s Cup!

    A Dutch team led by Simeon Tienpont wants to participate in the upcoming America's Cup in 2021. The KNZ & RV from Muiden and KR & ZV 'De Maas' from Rotterdam have reported to the Royal New Zealand Yacht Squadron as challenger for the 36th America's Cup. Tienpont, the former skipper of Team AkzoNobel and America's Cup winner, seems the ideal foreman.

    "Now is the chance"

    Tienpont: "Now is the chance for the Netherlands to get a Dutch challenger on the water for the first time in history. The design of the AC75 and the technical specifications are perfectly suited to the Dutch maritime and aviation industry.

    (translation courtesy of Google Translate)

    2 days out from the closing date for nominations doesn't really seem to be "the time" given that nominations have been open for 10 months. ;)
     
  5. Doug Lord
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    Doug Lord Flight Ready

    Eight new Entries for 36: Pressure Drop - 8 New Teams Submit For 2020 America's Cup http://www.pressure-drop.us/forums/content.php?8803-8-New-Teams-Submit-For-2020-America-s-Cup
    Excerpt:
    The period for late entries for the 36th America’s Cup presented by Prada officially closed today, the 30th November 2018.

    The Royal New Zealand Yacht Squadron and Emirates Team New Zealand can confirm there have been an additional 8 Notices of Challenge received by the 5pm (NZT) deadline.

    According to the supporting entry documents, only one of these entries is capable of immediate acceptance while the remaining seven notices of challenge carry conditions. Some of the entries are likely to be invalid, something which will be determined through a vetting process which will begin immediately.

    UPDATE-12/6/18:
    Pressure Drop - Malta Becomes 4th Challenger http://www.pressure-drop.us/forums/content.php?8821-Malta-Becomes-4th-Challenger
     
    Last edited: Dec 6, 2018 at 7:27 PM
  6. Doug Lord
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    Doug Lord Flight Ready

    Foiled by the Weak Link-broken foils!--from Pressure Drop:
    Pressure Drop - Foiled By The Weak Link http://www.pressure-drop.us/forums/content.php?8806-Foiled-By-The-Weak-Link

    Excerpt:
    A respected yachting commentator claims teams' preparation for the next America's Cup could be set back by up to three months due to technical difficulties, while a proposed second preliminary regatta could be scrapped altogether.

    Peter Montgomery told Radio Sport the date syndicates will be allowed to launch the first boats on the water ahead of the 2021 event in Auckland will likely have to be pushed back by three months, after tests revealed that the foils featured on the radical monohull design couldn't cope under load.

    "They've been doing load tests and they have been breaking and so there comes the issue," Montgomery said.
     
  7. Doug Lord
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    Doug Lord Flight Ready

    F0ils: (Thanks to Jack Griffin)

    Ineos proto experimenting with different degrees of anhedral:
    AC 75 Proto anhedral.jpg



    American Magic Proto with straight foils:
    AC 75 straight foil amer mjc proto.jpg
     
  8. OzFred
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    OzFred Senior Member

    The INEOS port foil likely doesn't comply with the current rule v1.1. Difficult to know though without accurate dimensions.

    If the foil is the full 4m width, anhedral can only be something less than 20°, maybe 15° max allowing for thickness of the foil and fairing at the T. More can be applied to a shorter foil, but it has to stay inside a roughly 4m x 0.7m box (more was allowed in v1.0, so the foil may have been designed to comply with that).
     

    Attached Files:

  9. OzFred
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    OzFred Senior Member

    It seems there will definitely be at least 2 more challengers, with perhaps two more possible.

    America's Cup: Bases filling as Challengers go unconditional
    “As of today, there are two of [the 8 new] Challenges which are immediately capable of Acceptance. Immediate Acceptance means that all their requirements under the Protocol and Deed of Gift have been satisfied.”

    “We also have several, what we call Conditional Entries. They are looking for variations of what is set out in the Entry document. These could be a World Series Regatta or pre-regatta in 2019 or 2020, in their home port. Or, they might be looking for a variation of terms on their entry payments.”

    “All the entries have come from credible yacht clubs, although we are cautious we are very respectful of the entries they are putting in. They have all put in a huge amount of effort and taken a big step. It has taken a lot of courage for them to submit their entry. So we are treating them all with the respect they deserve.”

    There is room for 6 challenger bases, so the 7th challenger will have to find their own base. Bases are awarded in the order that challenges are accepted, so one of the teams that have made their entry conditional may have the added burden of finding a base.

    Identities still haven't been revealed, but it's expected that the 4th challenger is the Royal Malta Yacht Club, at least according to the Times of Malta.
     
  10. Doug Lord
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    Doug Lord Flight Ready


  11. Doug Lord
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    Doug Lord Flight Ready

    Ben talks about INEOS progress:
     
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