Bristol Channel Cutter with a cute Butt

Discussion in 'Boat Design' started by kudu, Sep 23, 2005.

  1. SailDesign
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    SailDesign Old Phart! Stay upwind..

  2. kudu
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    kudu Senior Member

    She's a fine looking boat! If only she was a 28 to 30 footer. Thanks
     
  3. kudu
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    kudu Senior Member

    I firmly agree...She's sweet! Are there any able designers within boatdesign.net who could stretch her to 28-30 feet?
     
  4. Bergalia
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    Bergalia Senior Member

    Bristol Chanel Cutter with cute butt

    Paulo - for a 'foreigner' :D you have immaculate taste...
    Don't tell them - but I'd swap my wife and two daughters to own a lady like that ;)
     
  5. DGreenwood
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    DGreenwood Senior Member

    He has some others that are not on his site. The plans for a 30 footer that Wooden boat sells that is just a heart breaker. An ex employee of mine had him do a custom design for him...sweeet. He seems fair about his prices too. He doesn't do a bad double ender either
     
  6. DGreenwood
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    DGreenwood Senior Member

  7. DGreenwood
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    DGreenwood Senior Member

  8. DGreenwood
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    DGreenwood Senior Member

  9. SailDesign
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    SailDesign Old Phart! Stay upwind..

    DGreenwood - why not just admit it , you've been in love with the Tumlaren since you first saw one in 1963....
     
  10. DGreenwood
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    DGreenwood Senior Member

    Of course we must not forget Knud....hey...how did you know how old I am? ;?)
     
  11. SailDesign
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    SailDesign Old Phart! Stay upwind..

    Just a guess, DGreenwood, just a guess. Based on your suggestiuons above, but basically a guess.
    I mention Tumlarens simpkly because I fell in love with them at first sight in 1963 (I was 8 at the time)
    Steve
     
  12. kudu
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    kudu Senior Member

    I got some feedback from a boat designer regarding this thread. When I asked him if he could draw plans for a 28 - 30 foot double ended Bristol Channel Cutter, he informed me that a double ender at that length would not perform as well as a transom stern. I would like to ask here...Does anyone know the hows and whys of what this designer speaks of ? I know nothing of hull design but to me it all seams relative. If a double ender is good for say a 38' or 48' sailboat and all things being equal, why not a 28 or 30' ? Please unconfuse me :confused:
     
  13. Bergalia
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    Bergalia Senior Member

    My first thought is that he may not know how to design 'double enders....'
    But of course I may be wrong... ;)
     
  14. FAST FRED
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    FAST FRED Senior Member

    "he informed me that a double ender at that length would not perform as well as a transom stern. "

    As a boat goes faster it begins to climb her bow wave .

    The transom stern helps hold the stern up by having more displacement than the canoe stern.

    Therefore the canoe sterns sink furthur in the water at top speed , dragging a biger stern wave , loosing energy , limiting top speed.

    Unless your in a whole gale and have unlimited energy , when the stern will go down a couple of feet and drag a big hunk of ocean with it.

    Any boat , with a short amount of overhang will begin to drag big water when run at "over" hull speed.

    On our 33ft Motor Sailor this can be used to great advantage.

    A 3 cyl antique Volvio MD 3b is rated at 15 hp when used as a one cylinder, 25 hp when built as a 2 cyl and downrated to 35hp in the 3 cylinder config.

    AS the boat has a "cruising prop" intentionally oversized to reduce cruise rpm she can absorb a bunch of power.

    After all day on the waterway , being passed by marine motorists with NO concept of hoe to pass safely and quickly we can have FUN.

    The motorists usually tie up early , so we simply go full throttle dumping 45hp into the stern wave. The Maurice Griffiths design has a big transom but short overhang and when severly overpowered for a min or two will go down 18 inches.

    This creates a delightfull stern wave for the motorists tied alongside a dock.

    Of course they cant believe a small sail boat made such a wave , whemn they scream on the radio , we just tell 'em it was a M motorist they didnt notice.

    Getting even is half the fun!

    FAST FRED

    FAST FRED
     

  15. kudu
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    kudu Senior Member

    Thanks for the input FastFred...Is it possible to design a double ended stern that IS radically more efficent ? Or, are all double enders created equal?
    Also, how much of a loss of forward momentum are we talking about, two or more knots?
    I need to back up...What if a canoe stern was designed instead of a double ender, then what? Does the additional width of the stern negate the issue you speak of, or is it the same difference? kudu
     
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