Historical multihulls

Discussion in 'Multihulls' started by Gary Baigent, Feb 26, 2012.

  1. Doug Lord
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    Doug Lord Flight Ready

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    Thanks, Corley...
     
  2. Gary Baigent
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    Gary Baigent Senior Member

    Excellent find, Corley - Formula 40, a bit too far ahead of its time ... but now carried over to Extreme 40's and AC 45's. The Thompson Triton looked great to my biased eyes.
     
  3. redreuben
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    redreuben redreuben

    Got to say, I'm loving this thread !!!
    RR
     
  4. Doug Lord
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    Doug Lord Flight Ready

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    Gary, do you(or anyone) happen to have a picture of Tritons foils?
     
  5. Gary Baigent
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    Gary Baigent Senior Member

    This is Adrian Thompson's Formula 40 Promocean. Either Triton is a sistership or else there was a rename. Not sure about that. Maybe someone else knows. The second jpeg is Promocean with the foils removed; I read somewhere that the boat was a dog without them. Anyone else know the history?
     

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  6. HASYB
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    HASYB Senior Member

  7. Corley
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    Corley epoxy coated

    There is so much multihull racing history recorded on VPLP's news page that it's easier to post a link for everyone to browse at their leisure.

    vplp news page
     
  8. Sand crab
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    Sand crab Junior Member

    Here's a Kantola 34? on CL. Looking well kept for a 1979. Looks like it's for sale by the original builder!
    http://orangecounty.craigslist.org/boa/2861214675.html
     
  9. Richard Woods
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    Richard Woods Woods Designs

    I sailed against Promotion and thought it was a dog, as did everyone else, it was certainly the slowest boat racing. I remember the publicity said something on the lines of "buy this boat, it is the fastest F40, or your money back'. Even with that incentive no one did.

    Promotion and Triton were the same boat. I think it had another name as well

    Richard Woods of Woods Designs

    www.sailingcatamarans.com
     
  10. Doug Lord
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    Doug Lord Flight Ready

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    Richard, Gary said the foils were removed at some point-did Promocean have foils when you raced against it?
     
  11. Gary Baigent
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    Gary Baigent Senior Member

    If Promocean/Triton was a dog (with or without the inverted Y foils? - I would imagine it would be near powerless with just the small floats) then the other very similar F40, the Marc Lombard Region NPdC, would also have been a dog ... yet this same boat is the renamed Fildou today ... and I don't think it is a slow boat, see jpeg. Also, of course, Adrian Thompson later designed We/Sebago; a superior wing mast rigged (compared to Promocean's fixed version), longer and lighter, refined version of Promocean; not a barker either imho.
    Foil boats without foils are not a good solution; I remember the early Derek Kelsall Azulao OSTAR foiler sailed by Nick Clifton - the foils were removed - just asking for trouble; it capsized.
    The world's fastest yacht, Hydroptere, sailing without foils would also be a disaster.
    Fildou at Golden Oldies regatta, We/Sebago, an early Lombard foiler design, never built, but interesting.
     

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  12. Doug Lord
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    Doug Lord Flight Ready

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    Gary, whats interesting to me about these older boats(and your newer boat and my DF18), designed with ama foils but no main hull foils, is that with a very short ,low buoyancy ama the foils have to be designed really carefully: the foil/ama combo has to be matched pretty closely to whatever the designers max speed/RM is. Otherwise IF the ama/foil combo developed too much lift and allowed the main hull to fly there would be zero pitch control or very, very little. In other words, some degree of main hull immersion is essential for pitch control on this type of foil assisted tri. Do you agree with that assesment?
     
  13. Gary Baigent
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    Gary Baigent Senior Member

    Yes, and also maybe; the T rudder provides pitch stability because it is "locked in" through speed through water - but no rudder foil and yes, there will be pitch problems if the float foils develop too much lift.
    The long float trimarans with or without foils, handle large waves extremely well and provide a more stable ride - no doubt about that.
    We have to thank Hydroptere team for showing what can be achieved with small floats/wide spread foil/rudder platforms. Still at 60 knots peak boat speed and savage winds ... still things to learn.
     
  14. caiman
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    caiman Junior Member

    Hi
    Some pics of the Barmouth to Fort William Three Peaks Yacht Race before the comittee decided to live firmly in the past,and ban multies from the race.Don't know the exact date,probably 88,but definatly pre 1989.I actually managed to get a taz on Castlemain XXXX,first(and only so far) go on a big Cat.It is a bit scary that it's taken me 25 odd years to buy my own Tri !!!.Doug-hope the pic of the foil is usefull.
    Cheers
     

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  15. Doug Lord
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    Doug Lord Flight Ready

    ==========================
    Yes-thanks very much....
     
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