Abstract: A flowing air or wind responsive engine having a shaft supported by a carrying construction with a radial flow wheel with blades of large diameter fixed to the shaft, the shaft being maintained in a generally horizontal position, and the wheel is provided with several blades each of which is fixed to the shaft to form a spoke wheel arrangement, the wheel being rotatable about its own vertical axis of symmetry at the top of the carrying construction. Wind braces are connected to the blades so as to connect them together to form a sturdy structure which is non-deformable under the pressure of a strong wind.