[Scott Dorsey]

Phil Allison wrote:
** Adding mas to the platter would only make the bouncing worse.

The problem is lack of damping.

Adding mass would make it bounce at a lower and lower frequency, so you could
get it down to very long periods. But agreed, the lack of damping is the
worst problem.

The more I think about it, though, the more I think that the nonlinearity of
the repulsion means you can't easily model it simply as a damped spring
system, since it's nearly "bouncing off the stops" at the extremes with a
low-resistance band in the middle. I think this is actually going to be
worse than spring coupling if one were to do the math.

How the heck do you damp something that floats ?

Put it underwater! Or in motor oil! Or in a sulfur hexafluoride atmosphere!
--scott

Or sand...
--
"C'est un Nagra. C'est suisse, et tres, tres precis."