Unlike most windmills, the wind arrow does not need to shut down or pivot away from strong wind in order to avoid damage making it more efficient and more easily maintained.
Related Stories
Robert Mundell The Euro
In the 1970s, Robert Mundell chair of economics at the University of Waterloo at the time, laid the groundwork for the introduction of the Euro.
Convertible Baby Carriage
This convertible sleigh was patented in 1912 and sold by Beilstein & Kranz Manufacturers of Berlin.