Abstract
To predict drawbar pull property of flexible tractor on snow covered terrain for fresh or newly fallen fresh snow and sintered snow in low temperature -13°C, some energy equilibrium equation of track motion for various snow depths has been analysed. It has been cleared that the drawbar pull decreases gradually with slippage of tractor and gets a peak value at no slip ratio, and the drawbar pull D.B.P. can be calculated approximately by effective maximum traction force of track belt T drove from engine power, track width B and deformation energy loss per unit area En of snow terrain under track belt due to compaction asD.B.P.=T-2BEn.And to predict the drawbar pull from field measurements, some circular plate penetration test and vane cone shear test results are cleared to be usefull.
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