Rhino has this neat feature of calculating the volume of
an object. If you know the volume you know the weight.
The density of steel is .3 pounds per cubic inch.

The solid shaft on the left weighs 6 pounds.
The hollow four inch diameter shaft on the right with
a .1 inch wall thickness weighs 2.5 pounds.

Dan is doing a FEA on the hollow shaft so we
shall see what we shall see.

Paul Lamar
 
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