Blog
Save
Email
Print
ShareA helicopter is an aircraft which is lifted and propelled by one or more horizontal rotors (propellers).
Helicopters are classified as rotary-wing aircraft to distinguish them from conventional fixed-wing aircraft.
Compared to conventional fixed-wing aircraft, helicopters are much more complex, more expensive to buy and operate, relatively slow, have shorter range and restricted payload.
The compensating advantage is maneuverability: helicopters can hover in place, reverse, and above all take off and land vertically.
Subject only to refueling facilities and load/altitude limitations, a helicopter can travel to any location, and land anywhere with enough space (approximately twice the area of the rotor disk).
For more information about the topic Helicopter, read the full article at Wikipedia.org, or see the following related articles:
Aircraft — An aircraft is any machine capable of atmospheric flight. A first division by design among aircraft is between lighter-than-air, aerostat, and ... > read more
Seaplane — A seaplane is an aircraft designed to take off and land (correctly, though less commonly termed, "alight") upon water. There are two types of ... > read more
Military aviation — Military aviation is used to attack or defend a country through the sky. There are many types of military aircraft, but the basic types of military ... > read moreRecommend this page on Facebook, Twitter,
and Google +1:
Other bookmarking and sharing tools:
more 
