Question

who found helicopter at first time and in which year ....tell in detail ​

Answer 1

Answer:

On September 14, 1939, the VS-300, the world's first practical helicopter, took flight at Stratford, Connecticut. Designed by Igor Sikorsky and built by the Vought-Sikorsky Aircraft Division of the United Aircraft Corporation, the helicopter was the first to incorporate a single main rotor and tail rotor designed

Answer 2

Who :

Answer:

Igor Sikorsky  

Explanation:

Many inventors and engineers from all over the world built prototypes of helicopters after 1912, many of which were used in the first two world wars, but in the United States, Igor Sikorsky is credited with creating the first mass-produced helicopter in the history of flight.

When:

Answer:

September 14, 1939  

Explanation:

On September 14, 1939, the VS-300, the world's first practical helicopter, took flight at Stratford, Connecticut. Designed by Igor Sikorsky and built by the Vought-Sikorsky Aircraft Division of the United Aircraft Corporation, the helicopter was the first to incorporate a single main rotor and tail rotor design.