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In 1936 the German testpilot Ewald Rohlfs ( 1911 Bremen, Germany - ?) made the first flight of a helicopter, the Focke Wulf FW-61. One year later he took the helicopter to an altitude of 1,130 feet (344 meters) and then idled the engine using its spinning rotors to descend safely to the ground. Rohlfs, Ewald

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Topics: Ewald Rohlfs, Ewald Hering, Ewald André Dupont, Ewald Christian...

Ewald HeringEwald Hering ( 1834- 1918) was a German physiologist who did much research into color and spatial perception. Hering disagreed with the leading theory developed mostly by Hermann von Helmholtz. Helmholtz's theory stated that the human eye perceived all co	Ewald André DupontEwald Andre Dupont ( 1891- 1956) was a German movie director. He was born on December 25, 1891 in Leitz, Saxony, Germany and was one of the founders of the German film industry. A columnist for a newspaper, in 1916, Dupont became a screenwriter and began	Ewald Christian von KleistEwald Christian von Kleist ( March 7, 1715 August 24, 1759) was a German poet and officer. Ewald Christian von Kleist was born at Zeblin, near Koslin in Pomerania. After attending the Jesuit school in Deutschkrona and the gymnasium in Gdansk, he proceeded
Ewald RohlfsIn 1936 the German testpilot Ewald Rohlfs ( 1911 Bremen, Germany ?) made the first flight of a helicopter, the Focke Wulf FW-61. One year later he took the helicopter to an altitude of 1,130 feet (344 meters) and then idled the engine using its spinning r	Ewald von KleistEwald von Kleist ( 1881 1954) was a leading German Field Marshal during World War II. In 1939 he was recalled to active duty at the age of fifty eight. In 1942 he was sent to command troops in the Caucasus in order to capture important oil wells in the ar	Ewald's sphereEwald's sphere is a geometric construct used in X-ray crystallography which neatly demonstrates the relationship between :(a) the wavelength of the incident beams of light, :(b) the angle of diffraction for a given reflection, :(c) the unit cell and recip

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