Author

Volker Wittig

Document Type

Thesis - Open Access

Award Date

1990

Degree Name

Master of Science (MS)

Department

Agricultural Engineering

Abstract

A new method of predicting the drawbar pull developed by agricultural tractors was designed and evaluated. A single wheel tester, similar to a rear tire of a tractor, was used to establish topsoil traction conditions by loading it with known loads and measuring the maximum transferable torque. This resulted in a linear relationship between torque and wheel load. The slope of this line represents, therefore, a certain topsoil condition. When used with the soil parameters bulk density and moisture content, the prediction of tractor coefficient of traction in relation to wheel slip was shown to be more accurate than the standard Wismer and Luth equation recommended by ASAE (ASAE, 1988).

Library of Congress Subject Headings

Tractors -- Tires
Traction-Engines -- Performance
Soil physics

Format

application/pdf

Number of Pages

101

Publisher

South Dakota State University

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