The key is to have enough empty space at the center, so that the overall
density is less than that of water.
On September 2, 2014 12:12:02 PM CDT, Martin Koppenhoefer
<[email protected]> wrote:
> 2014-09-02 17:46 GMT+02:00 Clifford Snow <[email protected]>:
>
> > Then again if I made a pontoon out of concrete, they'd just sink.
>
>
>
>
> While I generally agree with your agreement, this is not true, ships
> can be
> built out of concrete (think aircraft carriers for instance), and
> German
> universities even hold a regular competition who builds the best canoe
> out
> of (fibre)cement: http://www.betonkanu-regatta.de/
> ;-)
>
> cheers,
> Martin
>
>
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