how to use bike gears to control speed of vertical axis windmill for pumping water?
I would like to use bike gears to switch gears eighter clockwise, or counterclockwise on a vertical axis windmill for pumping water. The purpose is to slow down the speed of the spinging rotor or switch it intoa idler gear, to allow the rotor to keep spinging, and to disconnect the water pump, so it wont' be damaged in high winds; Also not to slam the rotor to a sudden stop, by ingageing a brake. I am building this not only for myself, but also my church for them to give away free to needly people around the world. Thank you for any and all help in this matter.