PSN-L Email List Message
Subject: Re: possible vertical using magnets?
From: "Les LaZar" llazar@..................
Date: Fri, 9 Nov 2007 13:09:27 -0800
Your illustration is most informative, but the details of the pivot/axis are
unclear. How are the magnets oriented with respect to the blade and what
purpose do they serve?
----- Original Message -----
From: "Randall Peters"
Sent: Friday, November 09, 2007 11:40 AM
Subject: possible vertical using magnets?
> We know how you feel, but here's one more 'drinnk from the firehose'.
> We're 'on a roll', looks like.
> Meredith, like yourself, I saw the need to somehow communicate pictures;
> so I've placed one on my webpage at:
> Anybody know instinctively if it's fatally flawed? I know Chris you don't
> like 'knife edges'. Maybe they're not as bad with load reduction by the
> pulling shown here. What about your thoughts, Charles, since I like your
> And Keith, we're not opposed at all to what you've mentioned. I wrote a
> paper on the pendulum that moves in a way you'd like. Check out the pages
> that result if you type 'rattle in Seattle' into Google. I wouldn't be
> surprised if my
> 1988 paper "Chaotic motion from support constraints of a nondriven rigid
> spherical pendulum", Phys. Rev. A 38, 5352
> prompted the commercial development that resulted in the 'oak and brass'
> pendulum that writes in sand and which recorded that Seattle earthquake.
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