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Helicopters are agile aircraft capable of taking off and landing vertically, hovering and flying in different directions.

Helicopters have advantages over fixed-wing aircraft that allow them to access hard to reach areas, particularly useful in rescue situations. As well as search and rescue, helicopters are useful for tourism, medical transport, fighting fires, aerial photography, military activity and more.

The lift and thrust of helicopters are provided by spinning rotors, usually featuring two or more blades. Helicopters typically have one main rotor and one smaller rotor in the tail which counters the torque effect, stopping the helicopter from spinning in the opposite direction.

Around 1480 Leonardo da Vinci designed a machine resembling a helicopter which can be described as an ‘aerial screw’. The first working helicopter is believed to have been the Focke-Wulf Fw 61, first flown in 1936.