In memory of Konstantin I. Gorodetsky

On November 2, 2022, the Honored Mechanical Engineer of the Russian Federation, Doctor of Technical Sciences, Professor Konstantin I. Gorodetsky, the author of a number of works on transmissions of tractors and agricultural machines, died. Konstantin was born on January 11, 1932. He graduated from the tractor department of the Moscow Automotive Institute (MAMI). An important achievement of K. Gorodetsky in the scientific plan is his proposed refinement of the formulas of V. Mishke, which make it possible to evaluate the change in the efficiency of rotary hydraulic machines with a change in their operating mode. The resulting formulas are called “Gorodetsky’s formulas”.