[AR] Re: The Laws of Motion have just changed!
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
- Date: Thu, 14 Mar 2019 23:12:51 -0400 (EDT)
James Bowery <jabowery@xxxxxxxxx> wrote:
As to 70,000 RPM being a well-explored regime, you're absolutely
correct. The problem is there are a lot of variables other than
frequency that go into system behavior.
The problem is, there have been *many* high-speed rotating devices built,
covering quite a wide range of the design space. And while their behavior
certainly can be complicated, there's been nary a hint of any new physics
being required.
This isn't absolutely definitive; sometimes interesting things happen only
when details are exactly right -- resonance phenomena in particular are
often fussy. But the way to bet is that there aren't any big surprises
hiding there by now.
(Surprises for people familiar with the science and technology, that is.
Well-understood but complicated things can easily look bizarre and
inexplicable to a novice, especially one who's naively extrapolating
experience with simpler systems into a regime where complications set in.)
Henry
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