Displacement help

Discussion in 'Stability' started by osprey23, May 6, 2011.

  1. osprey23
    Joined: Dec 2009
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    Location: England

    osprey23 Junior Member

    Hi I'm hoping someone can help me, if I have the displacement of a boat as a weight, I there a way of converting it to volumetric displacement?
    Thanks in advance
  2. daiquiri
    Joined: May 2004
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    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    Yes, it is called Archimedes' Principle, has been known for some 2200 years and is an essential part of any basic high-school physics course.

    Weight = mass * gravity_acceleration
    Mass = water_density * Volume

    You do the rest.
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  3. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    That will give you different volumes for salt or fresh water and different temperatures
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  4. SamSam
    Joined: Feb 2005
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    Location: Coastal Georgia

    SamSam Senior Member

    Fresh water weighs around 62.5# a cubic foot, salt water around 64# a cubic foot. Divide the displacement weight by the type of water you're in to find the volumetric displacement. If your boat displaces 10,000 pounds, in fresh water that will be about 160 cubic feet of volume, in salt water, about 156.25 cubic feet of volume.
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