FRANCIS LEE sails

Discussion in 'Boat Design' started by bob perry, May 4, 2014.

  1. PAR
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    PAR Yacht Designer/Builder

    Your way of thinking gives "brain fart" a whole new meaning Bob . . .
     
  2. bob perry
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    bob perry Junior Member

    Par:
    I think my whole life has been a brain fart.
     
  3. bob perry
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    bob perry Junior Member

    Do you want to get serious? Think about it. I can get very serious.
     
  4. PAR
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    PAR Yacht Designer/Builder

    Sure, what's the ballast ratio and how much Cp change downwind at the typical angles you've encountered so far.
     
  5. bob perry
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    bob perry Junior Member

    Par:
    I have not checked for changes in Cp at various heel angles. I don't think there is any change. FRANCIS is almost symmetrical fore and aft. Not exactly but as close as any boat I have designed. There is no discernible change in trim as the boat heels. The boat is so narrow that there is almost no change in heeled waterlines either. There is no change to helm feel thru 30 degrees of heel. Not that I can tell. I have published the lines before. I might do it again. I'm a bit sensitive to flashing the lines around. I think you can see all you need to see in the photos.

    B/D is 49% including weight of steel fin.

    [​IMG]
    [​IMG]
     
  6. bob perry
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    bob perry Junior Member

    I am trying to promote my blog. It has some interesting details and personal stories regarding my history of design work. It may be of interest to you.
    http://perryboat.sail2live.com/
     
  7. bob perry
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    bob perry Junior Member

    406 views and four questions? This place is like a cemetery.
    I suppose you'd rather discuss Reynolds Numbers for five days.
    Here is some reality for a change. Dig in. Tear it to pieces.

    We race again on Saturday. This time with masthead and frac asym, chutes. This will be fun. I'm importing some ringers for the crew this time. No more Mr. Nice Guy.
     
  8. Rurudyne
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    Rurudyne Senior Member

    Go get'em!
     
  9. Petros
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    Petros Senior Member

    bob,

    I think most people on this forum is just speechless. For me the lines on France Lee are breathtaking. it is attractive and clearly functional, it just screams "speed", and yet is still so captivating and attractive to the eye, it is hard to have anything bad to say about it. It does not matter if it wins any races, it is a winner without ever having to even be put in the water. That keel is so awesome, once can just see the softly swirling stream lines flow around it, caressing it in a sensual dance of graceful fluid motion. It is almost a shame to hide it below the surface of the water, but one knows that is what it was designed for, and what it must do.

    I doubt that most on this forum are knowledgeable enough about a sailboat like this to even sound intelligent asking any questions. no one wants to break the trance those magnificent hull lines put you in, so no one dare speak.

    You might help us here, please tell us about the client's intent, what his goals for this boat are, and how you choose this design to meet it.
     
  10. bob perry
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    bob perry Junior Member

    Petros:
    My client, Kim, is a long time student of yacht design. He grewe up cruising in his parents Dragon Class sloop. He has owned a Swede 55, a K. Aage Nielsen 52' sloop and a 30 sq. meter sloop. He knows skinny boats and he likes skinny boats. Kim wanted a long, narrow day sailer. He likes double enders so we went with the pointed fanny. He is going sailing this evening. He keeps the boat on his own dock in front of his house in Port Blakely Harbor.

    I have known Kim for many years. We have discussed this boat several times. This time we made it come to life.
    [​IMG]
     
  11. philSweet
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    philSweet Senior Member

    Could you tell us a bit about the deck gear. Any reel winches, or is everything set up for manual under racing conditions? Can she be short handed with hydraulic assist?

    The deck sweeping jib in the photos would be pretty fussy to trim. Is there a higher cut jib with long, forgiving leads?.

    Mast height and sail area?
     
  12. bob perry
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    bob perry Junior Member

    Phil:
    Main hal comes back to a winch on the cabin trunk top, stbd side.
    Jib hal comes down thru the cabin trunk, thru a clutch, down to a turning block at the mast step. From here there is a fair lead to the electric mainsheet winch on centerline in the cockpit. It's a bit hard to imagine. But, it works. We figure with the jib furler you won't need to make many jib hal adjustments. This has proven o be wrong while racing. But we just lead the jib hal aft and make what adjustments we need.

    I should say that in our first race, while adding jib hal tension while on the wind in 30 knots AWS we blew up the pad eye that holds that turning block. Idiots! I'll take the hit on that call. Idiot! We now have a much beefier pad eye there.

    No, there is no high cut jib. I don't like them. I want the jib clew as close to the deck as I can get it.
    [​IMG]
    The rig is a stock carbon Farr 40 rig. We got one cheap. It was so close to what I had drawn that we thought we could use it and save some bucks. The "J" is longer. The Rm of the Farr 40 and FRANCIS are about the same. It has proven to be a stout rig. I am pleased with this call.

    You can sail it single handed. That was the whole intent. The mainsheet winch is electric and the jib sheets are easily handled with generous winches. This is a boat design to be one man's daysailer.

    Bottom line is, the boat works. Everyone one is very happy. Even the owner's wife.
     
  13. KimB
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    KimB Junior Member

    And we sailed her into the dock last night with a crew of three after a very light air race where no one actually finished the course. I love it when we can bring her into the dock without using the Yanmar. Kim
     
  14. KimB
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    KimB Junior Member

    Deck gear

    The light blue line on starboard in the aft cockpit in the third picture is the below deck jib furling line.

    The rest of the lines are pretty standard.
     

    Attached Files:

    Last edited: May 8, 2014

  15. KimB
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    KimB Junior Member

    Bow and stern knuckles
     

    Attached Files:

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