Handbook of construction plant, its cost and efficiency (1914)
Dana, Richard Turner, 1876-1928 · Chicago, The M. C. Clark Publishing Co. · leaf 603
this motor. The swinging machinery wasgeared to a 50 hp. motor, and the thrust motor was also 50-hp.The compressor which furnished air to the hoisting drum brake,the emergency brake on the swing motor, and the friction clutchand brake on the intermediate shaft were driven by a 2-hp. con-stant speed… … Fig. 289. View Showing Excavator Digging. Total time observed, 45.5 minutes. Digging and loading occupied 57% of the time. Delays, mov-ing up, etc., occupied 43% of the time. Rate of digging onobserved basis, 1,500 cubic yards of loose gravel in 8 hours.Total power consumed by shovel in 8 hours,…
Contractors' operations · Building
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