You mention 87 mph wind gusts. I was curious, what can your windmill handle? In high winds does the CFM keep going proportionately faster or is there some limit switch on the speed of the vanes up top, or maybe limit on the movement of the diaphragm producing the air down below? Come to think of it I have never seen what type of mechanical switches actually product the air on a windmill. Is it some right angle gears and some type of system that turns a rotating shaft into a circular up and down diaphragm action? There must be some limit to how fast the diaphragm cycles where you lose efficiency or output? If the windmill shaft instead ran a propeller (or impeller) underwater to produce air that would be cool!