A Russian Immigrant
A Russian immigrant to the United States, George de Bothezat, designed and built a four-rotor machine powered by a 180-horsepower (134-kilowatt) rotary engine under the sponsorship of the U.S. Army. It weighed 3,600 pounds (1,633 kilograms), and the x-shaped structure was more than 60 feet (18.3 meters) wide, with four [...]
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