A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward, and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of VTOL (vertical takeoff and landing) aircraft cannot perform.
Some helicopters reached limited production, but it was not until 1942 that a helicopter designed by Igor Sikorsky reached full-scale production, with 131 aircraft built.Though most earlier designs used more than one main rotor, it is the single main rotor with anti-torque tail rotor configuration that has become the most common helicopter configuration. Tandem rotor helicopters are also in widespread use due to their greater payload capacity. Coaxial helicopters, tiltrotor aircraft, and compound helicopters are all flying today. Quadcopter helicopters pioneered as early as 1907 in France, and other types of multicopter have been developed for specialized applications such as unmanned drones.
Below is a list of Most Expensive Helicopters in the World.
Sikorsky S-76C
The Sikorsky S-76C is a medium size commercial utility helicopter manufactured by Sikorsky Aircraft Corporation. The production of the S-76C began in 1977 with features like Twin Turboshaft engines, four-bladed main rotor, and retractable landing gears.
The S-76C is used by many famous people including the Royal family of England and the 45th president of United States, Donald Trump.
AgustaWestland AW139
The AgustaWestland AW139 is a medium-sized, twin-engine helicopter manufactured by AgustaWestland.The primary users for this helicopter include Irish Air Corps, UAE Air Force, Qatar Air Force, CHC Helicopters etc. The estimated cost is valued at a price of 14.5 Million US Dollars.
