Unique windmill with Halladay turbine in village Ruprechtov, near Brno, Czech Republic. Cyril Wágner the owner and builder installed in 1882 thru 1884 a Halladay turbine, named after its inventor and design engeneer, American farmer Daniel Halladay. The runner consists of a chain of operable vanes controlled by rods, enabling them to be tilted as required automatically according to the wind. Duble tail vane maintained the wheel at the right course. Using this invention, the mill could double its output in corn processing...The turbine with a diameter of 10 meters, weighing approximatelly 2 tons revolves at about 16 meters above the ground.