Who is the real inventor of helicopter?

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.

Did a black person invent the helicopter?

On November 26, 1962, African-American inventor Paul E. Williams patented a helicopter named the Lockheed Model 186 (XH-51). It was a compound experimental helicopter, and only 3 units were built.