Affordable seaworthy cruiser

Discussion in 'Boat Design' started by goodwilltoall, Jul 31, 2010.

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  1. goodwilltoall
    Joined: Jul 2010
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    goodwilltoall Senior Member

    Greetings,

    Trying to upload
     
  2. frank smith
    Joined: Oct 2009
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    frank smith Senior Member

    Goodwilltoall, where did it go ? it was very interesting .

    F
     
  3. goodwilltoall
    Joined: Jul 2010
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    goodwilltoall Senior Member

    Greetings, again.

    At attachments area it says the file is 2100x3250 and have to manually resize, will look into it and try to post later.
     
  4. goodwilltoall
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    goodwilltoall Senior Member

    Cross sections
     

    Attached Files:

  5. Lister

    Lister Previous Member

    No offense intended, but could you put a Little more shape. Its awfully boxy.
    Nice shape are not that difficult to built.
    I hope you don't mind, I took your picture.
    Lister

    [​IMG]
     
  6. goodwilltoall
    Joined: Jul 2010
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    goodwilltoall Senior Member

    Final drawing for 50', requirements fulfilled. Cant think of anything else having more compromises than boat design. Posted cross sections for building details only, still need all cross section views and calculations.

    Abandoned previous 50' because of inadequate steering arrangement. This one has higher COG and more windage. Side decks are min. 17", helm view is good, steering and controls are easily attached on deck. Water tight hatches quickly built. Side and aft openings with snap on or rolled clear plastic, for inclement weather.

    Opted for more storage aft rather than chart table, bench is for sitting instead of crouching when accessing shelves. Bed board stowed under seats for two extra guests and setup aft. Shelves, lockers, counters to be min 18" below deck. Better ventilation still being considered. Interior heights same as c20 van.

    Dotted keel line for cut off version which:
    1. adds weather helm
    2. turns better
    3. lowers wetted area.
    Forward keel still needed as cutwater, think amidship keel is obsolete. Aft keel pod will be neutral displacement after engine installation.

    1a urethane caulking has 25psi glass peel strength compared to 30psi for concrete. Will work and opening port lights can be added later but would only use them at deckhouse.

    These drawings should clarify most questions, if any known structural flaws are observed, notice would be greatly appreciated berfore building commences.

    Peace.
     
  7. goodwilltoall
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    goodwilltoall Senior Member

    Lister,

    Form follows function and is a beautiful thing of itself without the extraneous add ons. Curves were considered but would take away in other areas.
     
  8. goodwilltoall
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    goodwilltoall Senior Member

    Forgot to mention the 150th anniversary of the start of the American civil war, one of the saddest days the continent ever saw. Lincoln killed several hundred men in NYC as they marched against the war and if not mistaken several here in the Cleveland area.

    The verse about being careful with your steps is particularly important as both the left and right side politicos lead you astray. Liberty is a free gift of God and all good things come from Him.
     
  9. MatthewDS
    Joined: Mar 2010
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    MatthewDS Senior Member

    Have you updated your cost estimate recently?

    It appears that you are trying to achieve something like cold molding with your layers of plywood and (pine?) T&G, is this the case? Do you plan to sheath the hull inside and out with fiberglass?

    More questions!
    If I understand your sketch and commentary correctly, the bottom of the hull is flat, with the exception of a short fin keel at the bow, and a pod-like keel at the stern which includes the engine. Is this correct?

    Finally, I don't see anything holding up the deck. Are there deck beams? Similarly, your section through the hull shows nothing holding up the pilot house. Without some closely spaced bulkheads or deck beams, your deck is going to bounce like a trampoline, if not collapse under it's own weight.
     
  10. kerosene
    Joined: Jul 2006
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    kerosene Senior Member

    yep box is not exactly the most rigid shape on its own... better have some frames says my common sense.

    Love the detail around the window.
     
  11. goodwilltoall
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    goodwilltoall Senior Member

    Greetings,

    Yes, hull will be frameless.
     

    Attached Files:

  12. goodwilltoall
    Joined: Jul 2010
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    goodwilltoall Senior Member

    Incorrectly put 90 gal. fuel at aft area rather than 45 gal. fuel eachside. So corrected that and reposted with a pdf file.

    Hull is flat if looking at it in transverse view but, all areas have curve in them. Temporary frames during building. Whole hull will act a singular girder, the layered plys will transmit the loads from all four sides. Frames will actually weaken the hull unless they are closely spaced then, you lose the benefits of coldmolding in the first place. Ruell's book uses these details and the hull in book is actually much larger with smaller scantlings without taking into consideration the deck acting as a structural member as it will with this boat. These engineering principles have been laid down long time ago, frames and keels are used for centuries old boats.
     
  13. kerosene
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    kerosene Senior Member

    sure buddy.
     
  14. BATAAN
    Joined: Apr 2010
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    BATAAN Senior Member

    In the old hippie days when someone was seriously delusional the phrase was "you trippin' man...". This is such a stupid thing to do I constantly marvel at the wasted time and effort.
     

  15. goodwilltoall
    Joined: Jul 2010
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    goodwilltoall Senior Member

    Do plan to seal in and out to minimize water absorbtion and abrasion, how about using metal screening mesh found at HD for about 20 cents a SF, comes in sizes 8' wide x 150' long. Need min. three coat epoxy barrier below WL, mesh used just for building up barrier coat. What say you?


    This a strong way to build, do you guys know about frameless building?

    Peace.
     
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