KINEMATICS OF THE ROTARY SUBSOILER AND PLOW – GYROTILLER

Abstract

The first objective was to make a historic rescue of an equipment with an interesting principle, developed in 1925 - gyrotiller, a mix of subsoiler and rotary plow. It was widely used in the first decades of the last century, falling into disuse after the second world war. Historical notes with records of their performance are detected, especially from the 1920s and 1930s and on old-fashioned agricultural equipment websites, which still exist today. The second objective was to study the movements of the shanks: Using differential calculus as a tool, the equations of motion of the shanks of the aforementioned equipment are formulated, in order to predict some parameters of their behavior and develop a method for projects that might make use of its interesting soil tillage system. The equations are applied to three levels of linear tractor velocity, allowing us to predict the shank path and enable comparison to the fixed shanks of conventional subsoilers.

DOI: https://doi.org/10.56238/edimpacto2025.063-008