which will be faster,a catamaran,or 43' IOR racer,or 50' IOR racer

Discussion in 'Hydrodynamics and Aerodynamics' started by jon haig, Aug 19, 2019.

  1. jon haig
    Joined: Jun 2019
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    Location: pompano beach,fl

    jon haig Junior Member

    THIS is NOT a trick question.
    you guys that know your stuff, please give opinions.
    *the boats sailing side by side approx. 100 meters between boats. ,with the same amount of sq ft sail up,and all else being equal.
    *the boats are 37' prout snowgoose catamaran ,35' EDEL catamaran,43' IOR racer, and a 50' IOR racer.
    and maybe you can theorize the max speed in 30knt wind .with all apropriate sail area up.
     
    Last edited: Aug 19, 2019
  2. Blueknarr
    Joined: Aug 2017
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    Location: Colorado

    Blueknarr Senior Member

    Way too little information.

    What are the handicap ratings? They are the best indication of potential speed.
    Other unknowns:
    Condition of sails
    Condition of hull
    Condition of sail control hardware and running rigging
    Crew skill level
    Coarse layout ie round the buoys, point to point mostly upwind, reaching or running.

    And most importantly, what do you mean by fastest -- Which one drains the bank account?
     
  3. BlueBell
    Joined: May 2017
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    Location: Victoria BC Canada

    BlueBell Ahhhhh...

    Easy.
    The one that's up wind.
     
  4. Blueknarr
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    Blueknarr Senior Member


    Even in a jibing duel under spinikar?
     
    BlueBell likes this.
  5. gonzo
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    gonzo Senior Member

    At what point of sail and in what weather conditions?
     
  6. jon haig
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    jon haig Junior Member

     
  7. jon haig
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    jon haig Junior Member

    all conditions are the same for all boats ..ONLY difference is the boat design. ,you choose parameters.
     
  8. waikikin
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    waikikin Senior Member

    I'm choosing the Edel as fastest.... particularly if the main parameter is 5' of water depth... or a crew of one or two people... or if upwind in 30 knots with a crew of 10 then the 50' IOR.. or ??

    Jeff.
     
  9. gonzo
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    gonzo Senior Member

    Each boat may have an advantage at a particular point of sail or weather conditions.
     
  10. TANSL
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    TANSL Senior Member

    Why say generalities that, without being totally incorrect, are also not completely true?
     
  11. Chuck Losness
    Joined: Apr 2008
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    Chuck Losness Senior Member

    This is one of those questions that can't be answered. He says all things are equal which means everything is in the same condition. The major qualifier is in bold "with the same amount of sq ft sail up." This qualifier eliminates any possible comparison and makes it impossible to answer his question.
     
  12. waikikin
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    waikikin Senior Member

    Because it's that kind of question that demands generalities- the only commonality is the sqM of sail so the edel & Prout are probably similar with full sail whilst the 43 IOR is probably one reef & No 2 & the 50 IOR is probably 2 reefs in & a 2 0r 3 headsail or if the 50' IOR is at full main & 110% headsail that will either put extras on the 43 main & 160% & even more on the two cats so they can only be carrying these off the breeze so we have an apple, grapefruit & banana comparisons which are all generally fruit but different flavours- actually very simple;) Without stating a purpose such as "I can afford to buy one of these four boats but only feel able to fly x sqM of sail" which would be a bit more fair dinkum the question begs generality.
    Jeff
     
  13. gonzo
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    gonzo Senior Member

    Upwind, in force 7 winds, waves can build up to over 20 feet and are fairly steep. Both cats would be slamming the decks into the waves and making little or no headway.
     
  14. PNW sailor
    Joined: Nov 2017
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    PNW sailor Junior Member

    Having sailed IOR 40's and 50's a lot, and against miscellaneous multi hulls that I'm guessing are faster than the multis you mentioned. The IOR 50 will always be the faster boat. In any wind.
     

  15. jon haig
    Joined: Jun 2019
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    Location: pompano beach,fl

    jon haig Junior Member

    So in your experience a 43' farr (16,000 lbs ) and a 50' farr racer (25,000 lbs)will be faster than a Edel 35' (7,000 lbs)
     
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