Helicopter
Helicopter
Helicopter (/ˈhɛlɪˌkɒptər/ HEL-i-kop-tər), from the Greek words helix (spiral) and pteron (wing), is a type of rotorcraft in which lift and thrust are supplied by horizontally-spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward, and laterally.
Etymology
The word helicopter is adapted from the French hélicoptère, coined by Gustave Ponton d'Amécourt in 1861. It is derived from the Greek helix (ἕλιξ) meaning spiral or turning, and pteron (πτερόν) meaning wing.
Related Terms
- Rotorcraft: A heavier-than-air flying machine that uses lift generated by wings, called rotary wings or rotor blades, that revolve around a mast.
- Gustave Ponton d'Amécourt: A French inventor who coined the term hélicoptère in 1861.
- Vertical Takeoff and Landing (VTOL): Any aircraft that can hover, take off, and land vertically.
- Lift (force): A force that directly opposes the weight of an aircraft and holds the aircraft in the air.
- Thrust: The force which moves an aircraft through the air.
External links
- Medical encyclopedia article on Helicopter
- Wikipedia's article - Helicopter
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