. The steam-engine and other heat-motors. nute, Face V\ idth AverageWeight of MinimumWeight for Wheel in Rim Speed Rim Speed in Inches of Belt Wheels Balance Wheels Feet. 4800 Feet 5700 Feet Belt. Wheels. in Pounds. in Pounds. J per Minute. per Minute. 8 191 227 12 9 161 201 15 5,000 10 152 181 20 81500 8,000 11 139 165 24 9,400 9,500 12 127 151 27 13 117 140 30 13,250 15,000 14 109 130 33 14:500 18,000 15 101 121 35 16,500 16 95 113 37 18,500 18 85 101 42 25,000 20 76 91 50 42,000 32,000 22 69 82 60 52,000 65,000 24 63 76 26 58 70 28 55 65
. The steam-engine and other heat-motors. nute, Face V\ idth AverageWeight of MinimumWeight for Wheel in Rim Speed Rim Speed in Inches of Belt Wheels Balance Wheels Feet. 4800 Feet 5700 Feet Belt. Wheels. in Pounds. in Pounds. J per Minute. per Minute. 8 191 227 12 9 161 201 15 5,000 10 152 181 20 81500 8,000 11 139 165 24 9,400 9,500 12 127 151 27 13 117 140 30 13,250 15,000 14 109 130 33 14:500 18,000 15 101 121 35 16,500 16 95 113 37 18,500 18 85 101 42 25,000 20 76 91 50 42,000 32,000 22 69 82 60 52,000 65,000 24 63 76 26 58 70 28 55 65 30 51 60 * Power. 390 THE STEAM-ENGINE AND OTHER HEAT-MOTORS. Table B * VALUES OF PRIMARY CONSTANTS. KA KD Dameter -ofBalance Wheel Current Current in Feet. in Paralle and Operation. Currentnot in Parallel. 10 585 270 11 485 225 12 400 185 13 350 160 14 300 135 15 260 120 16 230 105 18 185 85 20 145 65 Analysis of the Rites Inertia Governor.—The designing ofsteam-engine governors is the work of a specialist. It involves. Fig. 211.—The numbers show variable positions of the eccentric center andgravity center at variable cut-off. The dotted lines AO and OG are ofvariable length. 0 is the center of the shaft; C is the center of the crank-pin; s is the spindle center; G is the center of gravity of the rotatingweights; M is an ideal center of mass placed at a distance equal to theradius of gyration from G; zz is the line of action of the spring; OG isthe ,line of action of centrifugal force; Gi is the line of action of tan-gential acceleration; Ia is the angular acceleration couple around G. Powt SPEED VARIATIOX CONTROL. 391 not only special knowledge of the action of such mechanism butalso shops and funds for experimentation of no mean propor-tions. The analysis here given gives not only an insight intothe action of this particular mechanism but gives an extendedapplication of various principles of mechanics. In this analysis,there is; first, a rather long preli
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