In which the Wright Brothers invent the airplane propeller.
Also note the other amusing claim:
They also introduced a twist along the length of the blades. This was necessary to ensure the angle of attack of the blades was kept relatively constant along their length
Pilot’s Handbook of Aeronautical Knowledge. Oklahoma City: U.S. Federal Aviation Administration. 2008. p. 2-7. FAA-8083-25A.
Hardly original work.
Just look at Maxim et. al. to see the truth. E.g. an
original near 18 foot example ( derived from wind tunnel work) hanging up in the Science Museum in South Kensington in London.