Engineering, 19.03.2021 06:20 johnnyaby69
Stripping overburden in the Illinois coal belt, the Dusty Coal Company uses 270-horsepower, track-type tractors (with direct-drive transmissions) and drawn scrapers. The overburden is a very soft loam that weighs 2,800 lb/yd (loose). Estimated RR factor for the haul road is 300 lb/ton. If the scraper weighs 35,000 lb (empty) and carries 25 loose cubic yards per trip, what is the RR of the loaded unit
Answers: 3
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Stripping overburden in the Illinois coal belt, the Dusty Coal Company uses 270-horsepower, track-ty...
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