Igor Ivan Sikorsky (1889-1972) was born in Ukraine, where he became an aeronautical engineer. In 1919 he shifted to the United States he established an Aircraft factory. He designed the first practical Helicopter, the VS-300, which first flew in 1939. The design of the Helicopter has been modified several times: at one point, the Helicopter flew in every direction except forwards.
Unlike most aircraft, which have fixed wings, a Helicopter has a spinning rotor with which two or more long, thin blades are attached. When the blades spin round, they lift the Helicopter straight up into the air. A Helicopter can take off from almost anywhere and does not need an airport runway to fly. It can levitate at one place, fly backward, forwards, and sideways. All these features make it the most versatile of all aircrafts. It is very beneficial in rescue missions, surveillance, and transport.
There are three flying controls used by a Helicopter pilot. The collective pitch lever alters the amount of lift produced by the main rotor. The Helicopter move forward, backward, and sideways with the help of cyclic pitch control. The Helicopter turn right or left with the help of rudder pedals.
The main and tail rotors speed up before the Helicopter take-off. The pilot lifts the collective pitch lever to increase the tilt of the rotor blades when the main rotor is turning very fast enough. The Helicopter takes-off when the tilt produces the lift. The higher the lever is lifted, the faster the Helicopter rises.
The Helicopter move in the direction the control is pushed with the help of the cyclic pitch control. It tilts the main rotor so that some of the rotor’s lift pulls the Helicopter along. Here, the pilot has pulled the control back to make the aircraft move backwards.