A helicopter is a type of Rotorcraft in which the elevator and the pressure are supplied by rotors. This permits the helicopter to take off and land vertically, to float, and to fly forward, backward and sideways. These attributes permit helicopters to be used in conga or isolated areas where fixed wing aircraft and large numbers forms of VTOL aircraft (vertical takeoff and landing) are not capable to perform.
The English word helicopter is adapted from the French word Hélicoptère, coined by Gustave Ponton D’amécourt in 1861, which originates from the Greek helix (ἕλιξ) “Helix, spiral, vortex, convolution ” and Pteron (πτερόν) “Wing “. English language Nicknames for the helicopter include “Chopper “, “helicopter “, “Helo “, “Heli “, and “Whirlybird “.
The helicopters were developed and built during the first half-century of flight, with the Focke-Wulf Fw 61 which is the first operational helicopter in 1936. Some Helicopters achieved limited production, nevertheless it was not until 1942 that a helicopter designed by Igor Sikorsky reached a large-scale production, with 131 aircraft built. Although most of the above designs have used more than one main rotor, it is the only main rotor with anti-uniluque tail rotor configuration that has become the most common helicopter configuration. Tandem Rotor helicopters are also widely used because of their higher load capacity. Coaxial Helicopters, sloping planes and composite helicopters fly today. Quadcopter helicopters were pioneers as early as 1907 in France, and other types of Multicóptero were developed for specialized applications such as drones.
There Are Three basic flight conditions for a helicopter: hover, front flight and transition between the two.