[Loch-ruadh] Trebuchet project(long)

[r baker]

Didn't know how much weight you were going for, money
spent or convenience factors involved. Wet Sand is
aprox 118lbs per cubic foot.
Never-mind :)


--- Sluggy <slugmusk at linuxlegend.com> wrote:
> r baker wrote:
>
> > 2 words...... Wet Sand
>
> Hi!
>
> Wet sand _is_ very cheap, but even as cheap as sand
> is, it can't hold a
> pickle to the weight/volume of lead. I'm taking a
> guess that wet sand
> would weigh about the same as an equivalent volume
> of concrete. A bag of
> concrete is about one cubic foot, maybe a little
> less, and weighs about
> 80 lbs. A cubic foot of lead weighs 708 lbs. The low
> melting point of
> lead lets us use scrap to form a counterweight of
> virtually any shape we
> desire.
>
> Now that does bring up a good point. We could cast
> stackable weights
> made from concrete and get many of the advantages of
> lead at perhaps
> lower cost.
>
> Actually, plain old iron makes a pretty good
> counterweight material for
> the money. It weighs in at about 500 lbs per cubic
> foot and should be
> cheaper than lead, but harder to shape.
>
> Professor Sluggy
>
>
>
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