Skin on Frame Raft

Discussion in 'Wooden Boat Building and Restoration' started by djwkd, Jul 21, 2009.

  1. djwkd
    Joined: Jul 2006
    Posts: 380
    Likes: 2, Points: 18, Legacy Rep: 51
    Location: Newcastle-Upon-Tyne

    djwkd Senior Member

    Just to tell you about my newest project.

    OK, so in the back yard i have an old wicker shelf that is pretty big. What im thinking of doing is covering it with tarp and filling it with floatation. Then, on the top i will add a wooden deck. Doing this gives me 944lbs buoyancy without factoring in the weight of the bottles, or between 609lbs and 761lbs with factoring in the weight of them (between 40lbs - 50lbs per sqr foot), which is more than my previous idea.

    The name of this glorious craft will be "The Bottle Basket"

    The site for this is here------------------------------------------------------
    http://raftbuilders.webs.com/thebottlebasket.htm
     
  2. gonzo
    Joined: Aug 2002
    Posts: 13,934
    Likes: 481, Points: 93, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    What kind of floatation? And anyway, why are you building such a contraption, is it to join the raft club?
     
  3. djwkd
    Joined: Jul 2006
    Posts: 380
    Likes: 2, Points: 18, Legacy Rep: 51
    Location: Newcastle-Upon-Tyne

    djwkd Senior Member

    No, gonzo. I am building it because i want to build a raft. No other reason. (Actually, also because i dont have the time/resources/money to build an actual proper boat, and i am amazed by rafts.)
    Type of floatation - Bottles, polystyrene, anything i can get my hands on.
     
  4. marshmat
    Joined: Apr 2005
    Posts: 4,127
    Likes: 146, Points: 0, Legacy Rep: 2043
    Location: Ontario

    marshmat Senior Member

    Sounds almost as 'redneck' as the "pontoon boat out of 55gal drums" that comes up every few months, djwkd. You'll be laughed at by the guys in proper teak-trimmed $500k yachts.

    But it sounds like it will work, and it sounds like you'll have fun with it. So I say, give it a try!
     
  5. djwkd
    Joined: Jul 2006
    Posts: 380
    Likes: 2, Points: 18, Legacy Rep: 51
    Location: Newcastle-Upon-Tyne

    djwkd Senior Member

    thanks for the advice :)
    The frame and all the stuff on it is finished, im just waiting on collecting bottles until the hull is full. This could take another couple months yet.
    But, yeah, thanks for the advice! :)
     
  6. djwkd
    Joined: Jul 2006
    Posts: 380
    Likes: 2, Points: 18, Legacy Rep: 51
    Location: Newcastle-Upon-Tyne

    djwkd Senior Member

    Almost finished filling with bottles. Considering filling with two part foam afterwards. I understand that, with the 2 part foam, it will be very difficult to replace bottles that have taken on water or been crumpled (by the pressure of water) - so i need to know - will this be worth my while?
    I understand that, when surrounded in foam, very few would take on water, but is the latter still a concern?

    Thanks again, Dom.
     
  7. djwkd
    Joined: Jul 2006
    Posts: 380
    Likes: 2, Points: 18, Legacy Rep: 51
    Location: Newcastle-Upon-Tyne

    djwkd Senior Member

    Outriggers.

    I have decided also to add one or two outriggers that fold in by means of a weird...rig...thing...(Will post a pic below).

    These are made of milk bottles glued to a flat piece of wood (eg. plywood).
    They will be 42" long (4 bottles) each, and should provide about 210lbs of buoyancy, 420 for the two. That's about 50%, right?

    Anyway, i know outriggers are supposed to be something like 160%, but these aren't :).
    Will they be OK?

    [​IMG]
     
    Last edited: Dec 30, 2009
  8. djwkd
    Joined: Jul 2006
    Posts: 380
    Likes: 2, Points: 18, Legacy Rep: 51
    Location: Newcastle-Upon-Tyne

    djwkd Senior Member

    Have also now found out what the draft will be with just me - between 1.15 and 2.4 inches. Is this a good draft? Or is it too shallow/too deep?


    EDIT: This is JUST for my weight, not the weight of the boat. I've just thought then, that this is probably inaccurate, as the boat on it's own must, logically draw some kind of draft?
    Can anyone help me here?
     
  9. djwkd
    Joined: Jul 2006
    Posts: 380
    Likes: 2, Points: 18, Legacy Rep: 51
    Location: Newcastle-Upon-Tyne

    djwkd Senior Member

    Ok, it's done now. And I had to skip out the outriggers, because, in practice, I couldn't attach them in a way that would make them adjustable. Will post photos on the site soon.
     
  10. jonr
    Joined: Sep 2008
    Posts: 721
    Likes: 11, Points: 0, Legacy Rep: 57
    Location: Great Lakes

    jonr Senior Member

    You could simplify and get rid of the wicker. That would be a highly compartmentalized inflatable raft. Then go further and tie all the bottles together and get rid of the tarp. Not sure what to call that.
     

  11. djwkd
    Joined: Jul 2006
    Posts: 380
    Likes: 2, Points: 18, Legacy Rep: 51
    Location: Newcastle-Upon-Tyne

    djwkd Senior Member

    A floatilla? Too late, now, anyway. All finished :)
     
Loading...
Similar Threads
  1. fairing guy
    Replies:
    12
    Views:
    263
  2. Apple Hill Boater
    Replies:
    4
    Views:
    565
  3. stuchambers
    Replies:
    3
    Views:
    1,530
  4. NoEyeDeer
    Replies:
    9
    Views:
    2,419
  5. onwatershipdown
    Replies:
    4
    Views:
    5,578
  6. fabrice
    Replies:
    2
    Views:
    2,865
  7. alan white
    Replies:
    90
    Views:
    59,649
  8. jhoward114
    Replies:
    5
    Views:
    1,701
  9. mcm
    Replies:
    16
    Views:
    24,744
  10. DSR
    Replies:
    13
    Views:
    1,114
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.