NASA NTRS · 19730000329
Small portable speed calculator
Abstract
Calculator is adapted stopwatch calibrated for fast accurate measurement of speeds. Single assembled unit is rugged, self-contained, and relatively inexpensive to manufacture. Potential market includes automobile-speed enforcement, railroads, and field-test facilities.
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Burch, J. L., Billions, J. C.. 1973-10-01. Small portable speed calculator. https://ntrs.nasa.gov/citations/19730000329
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