Air Transportation
Air travel has revolutionized global transportation by dramatically reducing the time needed to travel great distances. Journeys across nations or oceans that might have taken weeks or months can now be made in a matter of hours. With large numbers of people traveling in airplanes, air transportation has become a major part of the world’s transportation system.
A helicopter
A helicopter obtains lift from a set of rotor blades rather than from fixed wings, as does an airplane. Helicopters are sometimes used in cities to carry travelers from suburban or downtown locations to airports. Helicopters are also used to provide medical evacuation, traffic reporting, and access to difficult-to-reach spots, such as ocean oil platforms and mountainous regions. Helicopters are also important military vehicles. Military forces use them for cargo transport, for medical evacuation, and as gunships.
Air planes
Airplanes are heavier-than-air craft that use wings to produce lift in order to fly. Airplanes transport people from place to place and also ferry shipments of mail, perishable goods, and other important cargo (see Air Transport Industry). The airplane has also revolutionized warfare. Many aeronautical advances in technology, such as the jet engine, were achieved by military engineers and designers .
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Advances in technology produced faster, larger, and more durable airplanes
