د "چورلکه" د بڼو تر مېنځ توپير

 

The primary advantages of the helicopter are due to its rotor, which provides lift in a vertical direction, giving it the ability to take off and land vertically and to maintain a steady hover in the air over a single point on the ground. This allows the helicopter to land and take off from pinnacles and confined areas that airplanes are not able to take off from, including heliports in the middle of busy cities and rugged terrain in remote areas. The helicopter is used for rescue, medical evacuation and as an observation platform. Other operations that involve the use of helicopters are fire fighting, tours, as an aerial crane, logging, personnel transport, electronic news gathering, law enforcement, military and for pleasure.

 

Although helicopters were developed and built during the first half century of flight, some even reaching limited production, it wasn't until 1942 that a helicopter designed by Igor Sikorsky became the first helicopter to enter full-scale production,[2] totalling over 400 copies. Even though most previous designs utilized more than one main rotor, it was the single main rotor with antitorque tail rotor configuration of this design that would come to be recognized worldwide as the helicopter.