iandol on sat 17 aug 02
Dear Leland G. Hall,
You ask "....but I'm too new to this to know what the natural limits =
are, as far as pulling up tall cylinders. Or are there any?...."
Height is directly proportion to mass, inversely proportional to =
diameter and proportional to plastic strength.
The limiting factor for any clay is always its plastic strength under a =
compressive load. Clay which deforms easily under compression cannot =
support high loads. Clay which is firm enough at the base to support the =
total mass which sits above is often too hard to centre or throw.
This can be modelled mathematically and predictions made if you can find =
out the Compressive Modulus of the clay you are using.
Best regards,
Ivor Lewis. Redhill, South Australia =20
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