OVERCOMING thresholdS and ditches WITH wheeled vehicles
The most difficult problem of the theory is to determine the profile cross-maximum height of vertical obstacles (threshold), which can be overcome by biaxial wheeled vehicle. In this case, the precise definition of the required quantity depends on the consideration of all relevant parameters of the vehicle and the support surface, affecting the permeability profile. To date, the determination of the maximum height surmounted the threshold are recorded [1 - 4 and other]: The mass distribution along the axes of the machine (weight distribution) G1 / G2 ( G1, G2 - weight attributable to the front and rear axles biaxial machine), the coefficients of tire grip with the face j А threshold and the supporting surface of the rear wheels j х radius r undeformed wheels, radial tires D strain on the verge of a threshold coefficient of rolling resistance of the rear wheels fx. We also note that some authors [6 and other] consider rolling resistance negligible and believe fx = 0. Of course, this view is profoundly mistaken, especially regarding wheel drive vehicle specifically designed for use in off-road conditions, not to mention the agricultural tractor. Yes, actually, and other vehicles in heavy traffic conditions, even to assess the feasibility of their use. In this paper, on the advice of Professor G.O. Kotiyeva (MSTU by N.E. Bauman) we first considered rolling resistance coefficient on the threshold face fА, which had previously not taken into account by anyone.