Design of a Machine which Rotates Hoist Elements around its Vertical Axis

On construction site hoist elements are rotated by the hands of assembly workers. This work is dangerous. To get better working circumstances, the elements can be rotated by a machine. On the principle based on Newton’s third law “action and reaction” there is designed and built a machine. The result of the design process is that the principle of action and reaction works for light and small elements. For a short period of time the machine can withstand the wind forces by heavy and sizeable elements. How long this period has to be must be researched. Should this period be too long then other principles might to be considered.