TY JOUR TI THE ANALYSIS OF THE FACTORS, INFLUENCING ON LONGITUDINAL STABILITY OF TRACTOR KW longitudinal stability KW hinged unit KW controllability KW energy saving mode of transportation KW shift of the center of masses KW minimum weight KW maximum mass of a tractor KW coefficient of longitudinal stability. JO Vestnik of Kazan State Agrarian University AU Kartokhin , S.. AU Proporov , E.. PY 2015 IS 10 PB Kazan state agrarian University