According to history, the first practical helicopter in the world is created by in September 14, 1939 and they recognize it as the VS-300 that took its initial flight at Stratford, Connecticut.
The man behind this remarkable creation involved Igor Sikorsky who designed it and Vought-Sikorsky Aircraft Division of the United Aircraft Corporation built the helicopter. The unit is the also the first to feature a tail rotor and single main motor elements. During the initial test flight, it lasted for few seconds on the air and the pilot himself is Igor Sikorsky.
On May 13, 1940, they decided to offer free flight and this started the different ideas on how to create modern helicopters based on the revealed features of the VS-300. The actual size of this unit is about 28 feet in diameter and with three blade rotors with a speed of 250-300 mph.