Army Helicopter

A helicopter is a plane lifted and propelled by one or more large horizontal rotor (propellers). Helicopters are classified as spinning-spin planes to distinguish them from other regular fixed-wing aircraft. The word helicopter comes from the Greek helix (spiral) and pteron (wings). Engine-run helicopter was invented by the Slovak inventor Jan Bahyl.

Compared to other fixed-wing aircraft, helicopters are more complex and more expensive to buy and operate, rather slow, have close range and limited payload. While the advantage is its movement; Helicopters are able to fly in place, back off, and take off and land vertically. Limited to fuel and load / elevation facilities, helicopters can fly to any location, and land anywhere with a field of rotor and half diameter. The helipad is called helipad.