Quarter Ton Design Rule

Discussion in 'Boat Design' started by RichR, Feb 13, 2007.

  1. Windvang
    Joined: Jan 2006
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    Windvang Yacht Designer

    Crag

    We will have to wait, the class is just in it's second year. I think boats like the Ricochet GP 26 are much faster and likely cheaper (no inboard, less material, small headsails) than a Corby 26. They are trailerable behind a normal car which is a big plus on the mainland. Being a box rule it is far easier for new designers, builders an DIY owners to join, without the need for an in depth knowledge of IRC or IMS.

    The sprit is indeed a bit of a disadvantage in (Solent like) tidal waters, but the SB 3 class does nicely with it over there. Adding a conventional spi for handicap racing shouldn't be to much of a problem.

    Small boat IRC racing outside the UK (and a bit in France) is almost non existend. I don't know how it will sail under IRC, but it might be possible to outrun it's rating against IRC dedicated boats like the TP 52's can. If not you can always sail it in RORC sportsboat class.

    It will never be a very big class, but neither was te "true racer" 1/4 ton class. Now it is up to find a way to sell it to the British, who drive on the wrong side, play sports like cricket, and prefer their food served in a newspaper.

    ;) :p
     
  2. Crag Cay
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    Crag Cay Senior Member

    Oh I think you're right. I don't see the Corby 26 as the main competitor. If you want an light, asymmetric, trailable, outboard auxiliary, with a cramped interior to race against other similar boats, then it's the other sportboats classes that will be the competition, which in the UK means the Cork 1720, SB3 and maybe J80 , etc.

    But if you are limited to handicap fleet racing in your area, or want a more dual purpose boat, then you still have other options including the Corby 26.

    I wasn't really objectively evaluating the merits of the GP26 per se, but rather commenting on whether it could become the 'new 1/4 tonner'. I still believe the sailing world has changed over the years, and I don't see the GP26 gaining the same sort of momentum.

    Oh, and I hope the Dutch cricket team does well at the World Cup this summer ! Who knows, if the Australians continue their recent decline, you may well beat them. (Might as well broaden this out into an international pissing contest.) ;)
     
    Last edited: Feb 18, 2007
  3. jelfiser
    Joined: May 2006
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    jelfiser Senior Member

    joubet quarter ton

    hi to all,
    i recently bought a 1981 joubert-nivelt quarter ton it came from south england, his name was banana runner ... i'm happy to know that they still do regatta, here in south italy( expecially in small isle!!) exist only few exemplars , that boat had many modification , may be someone can give to me some information about the original plans?
     
  4. RichR
    Joined: Feb 2007
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    RichR Junior Member

    I was looking through the rules for the GP26 and it looks like the hull shape has to be fixed i.e. curved so no chines allowed in that case. (if my interpretation is right), but im going to give a design a go. trailability is a big positive for me.
    I think i will buy a quater tonner when i get back to the UK, they seem like a good value boat and plenty of competition.

    The australians are being very quite about the cricket at the moment!!! after the ashes its nice that they are being quiet again

    Rich
     
  5. jim lee
    Joined: Feb 2007
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    jim lee Senior Member

    What is a "Box Rule"?

    -jim lee
     
  6. Raggi_Thor
    Joined: Jan 2004
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    Raggi_Thor Nav.arch/Designer/Builder

    Box rules are simple rules that can be pictured as a box, for example max length, beam, draft, rig.
    One example is the Formula 16, F16:
    Maximum overall length is 5 m.
    Maximum overall width 2.5 m.
    Minimum weight (ready to sail) 107 kg.
    Maximum mast height 8.5 m.
    Maximum mainsail area (including mast) 15 m².
    Maximum jib area 3.7 m².
    Maximum spi area 17.5 m².
     
  7. jim lee
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    jim lee Senior Member

    I was wondering if it was something like that.
    I always thought

    Overall length (Including spars & sprits if they poke out)
    Overall width
    + Overall height (Mast tip to keel bottom)
    -------------------
    Rating number.

    would make a good measurement rule.

    I wonder what the boats would end up looking like with something like that?

    Thanks for the reply!

    -jim lee
     
  8. joz
    Joined: Jul 2002
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    joz Senior Member

    Tad

    Can you please pm me with the Address where I can get this and also do you know where I can get the 1/2 ton, 3/4 ton, 1 ton and any larger than 1 ton?

    Thanks
     
  9. Tanton
    Joined: Nov 2003
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    Tanton Senior Member

    I.O.R rating below 18.
    Quarter tonner Clavier. Showing sections. 24'Loa.10' Beam. Epitomy of early 1/4 tonners with a beamy hull and pintail stern.(1974)
     

    Attached Files:


  10. Tad
    Joined: Mar 2002
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    Tad Boat Designer

    joz....

    I wrote the note above some 2 years ago....I no longer see the IOR rule easily on the ORC site......see http://www.orc.org

    As far as I know there is no "Ton Rule", they were just level rating classes under IOR. At one time quarter-ton rated 18' (5.5m), half-ton 21.6' (6.6m), three-quarter-ton 24.5'(7.5m), one-ton 27.5'(8.38m), and two-ton 33'(10.1m). These were changed at some point...see the old quarter tonners thread on this board.
     
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