Home / Questions / The tractor-scraper whose travel-time curves are shown in Figures 4-4 and 4-5 hauls its rated..
The tractor-scraper whose travel-time curves are shown in Figures 4-4 and 4-5 hauls its rated payload 4000 ft (1220 m) up a 5% grade from the cut to the fill and returns empty over the same route. The rolling resistance factor for the haul road is 120 lb/ton (60 kg/t). Estimate the scraper travel time.
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