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  • Author or Editor: Gy. Sitkei x
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Our poor prediction capability on the sinkage and rolling resistance of wheels originates in the unreliable description of soil properties and the soil-wheel interaction. Some improvements in both have shown that the theoretical calculations may give results comparable with experimental observations. To determine soil properties, the “two wheel measuring method” is suggested. Further improvement possibilities have also been outlined.

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Motion of particles with air resistance (e.g. horizontal and inclined throwing) plays an important role in many technological processes in agriculture, wood industry and several other fields. Although, the basic equation of motion of this problem is well known, however, the solutions for practical applications are not sufficient. In this article working diagrams were developed for quick estimation of the throwing distance and the terminal velocity. Approximate solution procedures are presented in closed form with acceptable error. The working diagrams provide with arbitrary initial conditions in dimensionless form of general validity.

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