Re: Reflections in a Disc

[doug holtsinger <dsholt@domain.elided>]

As someone else pointed out, RMS means Root Mean Square,
a measure of surface roughness.  There's also a measure
called Average Roughness, and probably a few others as
well.

There are inexpensive hand tools for making an approximate
measure of surface roughness; visit my web site for more
information:

http://www.geocities.com/MotorCity/Lane/1150/head-rebuild.html#roughness


Doug Holtsinger
'86 Maserati Biturbo 425


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