Buoyancy Calculations

Discussion in 'Fiberglass and Composite Boat Building' started by fallguy, Jan 2, 2020.

  1. fallguy
    Joined: Dec 2016
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    Location: usa

    fallguy Senior Member

    I did some work calculating the average buoyancy of my 32' Woods foam build.

    I come up a bit short on the hull weight. We weighed the hull on a crane scale at 1500.

    The calc accounts for 1260 on a first pass.

    I also get positive buoyancy of about 1200 pounds on hull materials. The boat is corecell 12mm and epoxy. I calculate about 200 pounds cores, 350 glass, 300 resin, 200 pounds resin and tapes, 100 pounds seams and fillets (short).

    Does anyone have any guidance or experience to sanity/gut check these numbers?

    Note: I did not account for my watertights herein.

    Thanks.
     
  2. fallguy
    Joined: Dec 2016
    Posts: 6,776
    Likes: 1,386, Points: 123, Legacy Rep: 10
    Location: usa

    fallguy Senior Member

    I suppose I can also use my raw numbers to net out densities, but have not done so, yet.
     
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