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Chapter 2. Traction Mechanics. Part I. Basic Traction Mechanics

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Published in Advances in Soil Dynamics Volume 3 Chapter 2, Part I, pp. 25-58 ( Copyright 2009 American Society of Agricultural and Biological Engineers )  .(doi:10.13031/2013.26871)
Authors:   Part I Primary Author: Sverker Persson. Chapter Coordinators: Dvoralai Wulfsohn, Thomas R. Way, Shrini K. Upadhyaya, and William J. Chancellor
Keywords:   Elementary Traction Mechanics, Gross Effect Traction Mechanics, Tractive Power, Velocities and Tire Radius, Center of Rotation, Loss of Forward Motion, Zero Condition, Relationship between Slip, Rolling Radius, and Zero Condition, The Travel Ratio and Travel Reduction, Forces on a Traction Device, Location of the "Point of Support," Power Considerations, Tractive or Output Power, Input Power, Tractive Efficiency, Tractive Power Ratio, Energy and Power Losses in Traction, Power Distribution in a Tractor, Tractive Efficiency of a Tractor, Tractive Power Variations, Traction Device Performance Parameters, Optimum Tractive Device Performance, How to Present Tractive Performance Measures, Representative Performance Points, Conversion and Combination of Performance Parameters, Tractive Vehicle Mechanics, Tractive Efficiency of a Tractor, Measurement of Tractive Performance.

Abstract [First paragraph]: Tractive effort developed by off-road vehicles has been of interest to people engaged in agricultural, forestry, military, and mining operations. Most research conducted in off-road traction mechanics has focused on either agricultural or military equipment. From agricultural (and forestry) viewpoints the main emphasis has been on efficiently providing sufficient pull for tillage and transport equipment while reducing or minimizing the damage done to the soil and plants. The prime concern of military research has been the mobility of military vehicles, although more recently some emphasis has been made towards reducing environmental damage by military equipment. This review emphasizes agricultural and forestry applications, but other off-the-road uses, including construction equipment and military uses, are also considered. It builds on the pioneering work done by the USDA-ARS National Soil Dynamics Laboratory (NSDL), Waterways Experiments Station (WES), Cold Regions Research and Engineering Laboratory (CRREL), U.S. Army Tank-Automotive Command (TACOM), and the National Institute of Agricultural Engineering (NIAE).

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