provide a more comprehensive description of its operation wind flow passing between the multiple narrowing venturi spacings will develop a lower static air pressure or vacuum relative to the ambient static pressure of the wind this relative lower static air pressure will cause air to be drawn out of vacuum outlets 16 and mix with the wind flow between the venturi spacings the wind flow between the venturi spacings will be first accelerated as the spacings narrow and then decelerated as the venturi spacings again widen out and the wind flow exits the venturi spacings to join the wind flowing around invention 10 air drawn out of vacuum outlet 16 will also proceed from flow regulator 18 and past flow regulator valves 20 flow regulator 18 provides a means to convey air from a source or sources common to vacuum outlets 16 flow regulator valves 20 provide a means to regulate the flow of air drawn through vacuum outlets 16 and specifically prevent or reduce a reverse flow of air into vacuum outlets 16 one embodiment of flow regulator valve 20 as illustrated by fig6 is a panel hinged to open out and in the direction of the flow of air drawn through vacuum outlet 16 when conditions exist where.