-
Paul Cornu was the first to ever make the helicopter. he one of the many to try and make one and he succeed. his first helicopter was the twin-rotor craft, which was powered by a 24-horsepower engine. he died after his house got bomb in WW2. .https://en.wikipedia.org/wiki/Paul_Cornu
-
Igor Sikorsky was the second to build a helicopter. he is known for his First successful mass-produced helicopter. His first success came with the S-2, the second aircraft of his design and construction. His fifth airplane, the S-5, won him national recognition as well as F.A.I. license number 64. https://en.wikipedia.org/wiki/Igor_Sikorsky
-
French engineer Paul Cornu was born in Glos la Ferrière, France and was one of thirteen children. At a young age, he helped his father in his transports company.[1] He made history by designing the world's first successful manned rotary wing aircraft.
-
Igor Sikorsky was born in Kiev, Russian Empire (in present-day Ukraine), the youngest of five children. His father, Ivan Alexeevich Sikorsky, was a professor of psychology of Kiev St. Vladimir University, a psychiatrist with an international reputation, and an ardent Russian nationalist.
-
Paul Cornu was a french engineer who designed and built the first helicopter to perform a manned free flight. Cornu’s twin-rotor craft, powered by a 24-horsepower engine, flew briefly on Nov. 13, 1907, at Coquainvilliers, near Lisieux. https://en.wikipedia.org/wiki/Paul_Cornu
-
Igor Sikorsky first success came with the S-2, the second aircraft of his design and construction. In 1939, Sikorsky designed and flew the Vought-Sikorsky VS-300,[8] the first viable American helicopter, which pioneered the rotor configuration used by most helicopters today.[9] Sikorsky modified the design into the Sikorsky R-4, which became the world's first mass-produced helicopter.
https://en.wikipedia.org/wiki/Igor_Sikorsky
