Question

who has invented the first helicopter​

Answer 1

Answer:

1.Igor Sikorsky

2.Paul Cornu

3.Arthur M. Young

Explanation:

1.Igor Sikorsky was an Air craft designer.

2.Paul Cornu was a French engineer.

3.Arthur M. Young was American inventor

Hope this will help you

Answer 2

Answer:-

Igor Sikorsky

Explanation :-

On September 14, 1939, the VS-300, the world's first practical helicopter, took flight at Stratford, Connecticut.

Designed by - Igor Sikorsky

Built by- the Vought- Sikorsky