The elements of the mechanics of materials and of power transmission (1911)
King, William Richard, 1852- · New York, J. Wiley & sons; [etc., etc.] · leaf 238
Example III. — An open belt 3 inches wide connects a pulley5 feet in diameter with one 18 inches in diameter, the distancebetween the pulley centers being 12 feet. The larger pulleymakes 200 revolutions per minute, the coefScient of friction is0.35, and the greatest tension in the belt must not… … Fig. 4. Referring to Fig. 4, sin 6 _ 30 - 9144 0.1458, whence 0 = 8° 23. Arc of contact of smaller pulley = [180° —2 (8° 23)]-^ 180 = 2.85 radians. Ti log— = 0.4343MQ: = 0.4343 X 0.35 X 2.85 = 0.43320, ^2 therefore 240 Then rp rp -~ = 2.71, whence T2 = —- = ^^^^^ = 88.56 pounds.12 2.71 2.71 HP _…
Mechanics, Applied · Power transmission
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