PSN-L Email List Message
Subject: Re: instrument physics
From: Charles Patton charles.r.patton@........
Date: Sun, 17 Feb 2008 21:42:45 -0800
I agree with the liquid flow question, but I'm not certain I understand
the "...The contact friction is highly variable between lubricated
rolling surfaces." Are you thinking about surface tension of variable
areas of contact on a non-immersed contact pair? Wouldn't that
basically disappear if there was total immersion of wetted surfaces and
the oil doesn't use fiberous fillers (such as greases) to thicken it?
Charles R. Patton
P.S. I agree with you that I don't know how to fashion the bearing I was
proposing -- a half baked idea in formation, I guess. But in a separate
post I do visit a variation that I think is possible using as a starting
point the idea of controlling the height change of a mass to control the
period. I would definitely build it without oil first, then dunk it to
see what happens!
> So we marry
>> that with the old Rollamite bearings, to prevent side slip, and put on
>> (immerse in?) lots of lubricant to prevent stiction
> Uh Uh! Any liquid lubricant will really foul up such a
> suspension! Liquid flow and surface tension spring to mind. The contact
> friction is highly variable between lubricated rolling surfaces. You
> might try fluon spray or dry moly, or rely in the oxide coating.
> Chris Chapman
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