Question : Who invented the helicopter?
Option 1: Nicolaus Copernicus
Option 2: Igor Sikorsky
Option 3: Francis Cockrell
Option 4: Drinker
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Correct Answer: Igor Sikorsky
Solution : The correct answer is Igor Sikorsky.
The first successful multi-motor aircraft and the first production helicopter were both created by Igor Sikorsky. He was inducted into the International Air and Space Hall of Fame in 1966. He was born in 1889 and was a Russian-origin American aviation scientist. He designed and built the first successful single-rotor helicopter in the United States.
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Question : Who invented Helicopter?
Option 3: Kenneth Cockrell
Question : Who invented of 'Helicopter' ?
Option 1: Igor Sikorsky
Option 2: Louis Breguet
Option 3: Otis Boykin
Option 4: Frank Whittle
Question : Who invented the battery?
Option 1: Roentgen
Option 2: Volta
Option 3: Faraday
Option 4: Maxwell
Question : Who invented the safety razor?
Option 1: Gillette
Option 2: Steve Cher
Option 3: Steve job
Option 4: Lar Strauss
Question : Who invented the contact lens?
Option 1: Enrico Fermi
Option 2: Adolf Gaston Eugen Fick
Option 3: Sandford Fleming
Option 4: Benoit Fourneyron
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