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| Something you will not see every day. |
A helicopter is an aircraft that is lifted and propelled
by one or more horizontal rotors, each rotor consisting
of two or more rotor blades. Helicopters are classified
as rotorcraft or rotary-wing aircraft to distinguish
them from fixed-wing aircraft because the helicopter
achieves lift with the rotor blades which rotate
around a mast. The word 'helicopter' is adapted
from the French hélicoptère, coined
by Gustave de Ponton d'Amecourt in 1861.
The primary advantage of a helicopter is from the
rotor which provides lift without the aircraft needing
to move forward, allowing the helicopter take off
and land vertically without a runway. For this reason,
helicopters are often used in congested or isolated
areas where fixed-wing aircraft cannot take off
or land. The lift from the rotor also allows the
helicopter to hover in one area and more efficiently
than other forms of vertical takeoff and landing
(VTOL) aircraft, allowing it to accomplish tasks
that fixed-wing aircraft cannot perform... |
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