METHOD OF DETERMINING DRAWBAR RESISTANCE DEPENDING ON PARAMETERS OF TECHNOLOGICAL PROCESS WHEN TESTING AGRICULTURAL MACHINES IN THE FIELD Russian patent published in 2007 - IPC A01B77/00 

FIELD: agricultural engineering.

SUBSTANCE: proposed method includes measuring drawbar resistance depending on speed of operation of machine, operating width of machine or machines in multiple-machine aggregates and operating depth. Drawbar resistance of agricultural machine is measuring at one speed V at which tractor ganged up with machine develops maximum drawbar power depending, maximum drawbar power depending on typical drawbar pull of tractor. Drawbar resistance at all other speeds is found from where is area of section, in square meters, of deformable medium perpendicular to direction of speed and direction of deformable force; and are, according, operating width of machine and operating depth of soil, in m, at specific operating mode; is value of speed for which drawbar resistance of machine is determined, m/s; is numerical calibrated value of specific bulk modulus of impulse of forces of resistance to process of deformation of solid hard deformable medium

EFFECT: reduced material consumption and cost, input of labor of highly qualified specialists engaged in field tests.

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