Experimental engineering and manual for testing. For engineers and for students in engineering laboratories (1906)
Carpenter, Rolla C. (Rolla Clinton), 1852-1919 · New York, J. Wiley & Sons; [etc., etc.] · leaf 322
an be located atany distance from the tachometer convenient to the observer. Calibration.—The constant factor, which multiplied intothe dial-reading gives the velocity, is obtained by calibration.The calibration is performed by attaching the instrument toa float or a boat, and towing it past fixed… … Fig. 143, instrument is as follows (see Fig. 143) : The instrument isattached to the bow of a boat, so as to remain in a verticalposition ; the water being still, and little or no current. Theboat is propelled by a cord, which may be wound up by awindlass; the motion must be in a right line, and…
Building materials · Machinery
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