Geometrical radius

in gearing, the radius of the pitch circle of a cogwheel.

See also: Geometric

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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I was studying math and physics at the same time and I didn't catch the intent of using rate to determine a limiting geometrical radius. A course overshoot by distance is what gets you into trouble, not how long it takes you to make that overshoot.
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