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CITE
We have made every effort to follow citation style rules, but there may be some minor differences. If in doubt, please refer to the appropriate citation style manual.
Helicopters. (2013). In Q-files Encyclopedia, Technology, Aircraft. Retrieved from
https://www.q-files.com/technology/aircraft/helicopters/
"Helicopters." Technology, Aircraft, Q-files Encyclopedia, 11 Jul. 2013.
https://www.q-files.com/technology/aircraft/helicopters/.
Accessed 12 Dec. 2019.
Helicopters 2013. Technology, Aircraft. Retrieved 12 December 2019, from
https://www.q-files.com/technology/aircraft/helicopters/
Technology, Aircraft, s.v. "Helicopters," accessed December 12, 2019.
https://www.q-files.com/technology/aircraft/helicopters/

Helicopters
Sikorsky S76A Search and Rescue helicopter
A helicopter flies with a rotary wing (which spins round) instead of a fixed wing. The rotor blades are shaped like long, thin wings. They rotate very quickly. The main rotor provides lift and propels the aircraft through the air. The tail rotor stops the helicopter’s fuselage from spinning in the opposite direction to the main rotor. A helicopter can fly forwards, backwards and sideways, hover, and take-off or land vertically.
A British-built military helicopter, the Lynx
A helicopter battles a wildfire on a mountainside
Uses
Because its ability to take-off or land vertically, a helicopter does not need the runway that aeroplanes must have for take-off or landing. Helicopters therefore have a wide range of uses. These include: flying passengers to and from city centre buildings, oil rigs or ships; providing a rescue service in floods, earthquakes, on mountains or at sea; assisting firefighting, police pursuit or traffic control; serving as troop carriers in war.


Leonardo da Vinci, the Italian artist, is credited with inventing the idea of a helicopter in the 1480s. However, his design for a screw-shaped sail that was cranked around by hand was never built—and it would never have been able to fly.

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