Concrete Canoe! (Help)

Discussion in 'Boat Design' started by Luciano, Jul 17, 2004.

  1. Luciano
    Joined: Jul 2004
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    Luciano Junior Member

    Hi,,,, I a civil engineering student from Arizona State University. We are planning to build a concrete canoe for the next ASCE (American Society of Civil Engineers) regional conference competition.
    I never designed a canoe before, and my first difficulty is to decide what program to use (Prolines, ProSurf, MaxSurf, Rhino, SeaSolutions….). Therefore I’m trying to use this chat room, and your experience in the subject, to make the best decision possible.
    We need a program simple enough that beginners, like me, are able to use, but yet, advanced enough so that we would be able to design for drag. I would appreciate if you could lead me to the right direction.


    Thanks a lot....


    Luciano Sales (lbs@asu.edu)
     
  2. gonzo
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    gonzo Senior Member

  3. Tim B
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    Tim B Senior Member

    More critical perhaps than the software is the probable weight and size. I assume that you intend to carry people. this being the case, don't forget that in most canoes the crew weight is greater than the hull weight. The canoe obviously has to displace as much weight of water as weight of boatin order to float. You will need a very thin hull shell to obtain this with a canoe. So... how thin can you make the shell?

    Good Luck

    Tim B.
     
  4. gonzo
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    gonzo Senior Member

    Another aspect to consider is your canoeing experience if you have to paddle it. A circular bottom section is the most efficient but least stable.
     
  5. Luciano
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    Luciano Junior Member

    Canoe thickness

    I"ve been testing some sheets of concrete and I'm certain that I can make the canoe 3/8" to 1/2" thick. I plan to carry a maximum of 4 people and I was planning make the canoe 20' long. I'm in the process of testing the concrete right now and I don't have yet a final density value for the concrete. I would like the canoe to weight around 200 lbs.



     
  6. Luciano
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    Luciano Junior Member

    Paddling

    Yes,,,, one of the competitions is an actual race. We need a canoe that make ez turns and yet stable in a straight line.






     
  7. Not A Guest
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    Not A Guest Junior Member

    Perhaps you could use existing plans. I don't understand your reasons for a 20' boat, but you can scale up an existing 17' boat.

    200# is too heavy. College kids are building 60# 17' concrete canoes. 1/8"' walls pumping the mix between matched molds.
     
  8. Robert Brasted
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    Robert Brasted New Member

    There have been plenty of books on ferro cement construction, but they are probably out of print as the method was most popular in the '70s. You will need a steel mesh armature (other materials possible) to hold things together. What is your time scale for getting this done? I can find some information but it will be buried in my archives. Not sure why I get to be a junior member at 68
     
  9. Luciano
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    Luciano Junior Member

    Canoe mold

    Greeeeat….. 1/8” thick…. That is really good… I’ve built a mold out of Styrofoam, but I’m not sure how would I be able to build those matched molds. Is 17’ a standard length for canoes?


    Thanks

    Luciano



     
  10. Luciano
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    Luciano Junior Member

    Time scale

    The canoe needs to be done by April of 2005. But would be nice to get it done early and try it out at the lake before the competition.

    thanks





     
  11. Robert Brasted
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    Robert Brasted New Member

    Concrete canoe

    I'll be away for a few days but will dig out enough info for you to get started, over the weekend, and let you have it next week. Back in 1977 we designed a 9 metre canoe in ferro for fisheries work off the coat of Africa. One of the books I remember was written by Jay Benford so may still be available from his organisation. He's in the US so you should be able to track him down
     
  12. coyotecoast
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    coyotecoast Mike

    There is an actual website dedicated to concrete canoes (www.ConcreteCanoe.org)
    Or Some Variation, I read early Canoes weighed nearly 200# but with the newer designs using a Slurry of Cement and Microballoons and even Carbon Fibre to make some of them Weight as little as 75 #

    Mike McV
    Coyote Coast
     
  13. AmbitiousAmatur
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    AmbitiousAmatur Junior Member

    Alumilite company makes a silicon moldmaking gel that sets rather quickly and should work for concrete as well. The most important thing will be your mix. You want the right balance of weight but rigidity. I do know that we fit five people and gear in a Coleman Plastic 15ft Ram-x if you are looking for inspiration for shape. It was only floating 4 inches out of the water, but we made it back to the docks. Best of luck

    http://www.ask.com/bar?q=alumilite&page=1&qsrc=0&ab=0&u=http://www.alumilite.com/
     

  14. Submarine Tom

    Submarine Tom Previous Member

    Check Date...

    Ambitious,

    Check the date on the thread you responded to...

    With any luck, Luciano has graduated by now.
     
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