Multiple choice general knowledge

What Igor Sikorsky invented?

  1. Hydroplane

  2. Jet engine airplane

  3. Helicopter

  4. Glider
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Igor Sikorsky (1889-1972) was a Russian-American aviation pioneer who designed and flew the world's first practical helicopter. While he worked on various aircraft including fixed-wing planes, his most significant contribution was the development of the helicopter in the 1940s.

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