Uphill and Downhill Gradeability of Log Trucks with Short Log Trailers

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The use of cut-to-length systems has increased the use of short log truck and trailers in the western United States and elsewhere. The equations for uphill and downhill gradeability for loaded short log truck and trailer units are derived under conditions of nonturning motion. A sensitivity analysis shows both uphill and downhill gradeability of the short log truck and trailer is highly affected by the load distribution and is also affected by the angle of the tongue between the tractor and trailer. West. J. Appl. For. 19(2):88–94.

Keywords: Log trucks; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; gradeability; natural resource management; natural resources; steep roads; vehicle performance

Document Type: Regular Article

Affiliations: 1: Department of Forest Management University of Montana Missoula MT 59812 Phone: (406) 243-6606, Email: wchung@forestry.umt.edu 2: Department of Forest Engineering Oregon State University Corvallis OR 97331

Publication date: April 1, 2004

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Western Journal of Applied Forestry covers the western United States, including Alaska, and western Canada; WJAF will also consider manuscripts reporting research in northern Mexico that has potential application in the southwestern United States.
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