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[ATM] Subdiameter lap simulator

I wrote a subdiameter lap simulator applet and uploaded it to my 
website. You'll need Java loaded and enabled.

    http://www.astrocaver.com/java/sublapsim.html

It draws the disk, lap, and the stroke, then calculates the relative 
depth removed as a function of radius. The profile is plotted on the 
lower right quadrant.

It simulates a stroke at each of 360 degrees, and sums the number of Cm 
of lap that passes over every Cm of the glass surface.
It assumes that the lap is in perfect contact with equal weight and 
speed at all points.
It calculates lap excursion (distance from lap center to mirror center), 
  and checks that the lap center never crosses the mirror edge.

  I'd appreciate any constructive feedback.
After a chance to find and correct any bugs, I'll upload the Java source 
and GPL it.

(Now I know why I've been digging a hole in the center.)

        Bill Prewitt



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