Mechanical Flight
Mechanical flight is the use of a machine, called an aircraft, to fly. These machines include kites, helicopters, autogyros, airships, balloons, and spacecraft. Gliders provide unpowered flight. Another form of mechanical flight is parasailing. This occurs by a parachute like object being pulled by a boat.
The most common form of mechanical flight is aeroplane flight. Several steps are involved:
Planning,
Taxiing,
Take off,
Climbing,
Cruising,
Loiter
Descending, and
Landing. |
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A printing press in Kabul , Afghanistan .
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Forces in Flight
Several forces are particularly important for flight:
Propulsive thrust: (except in gliders)
Lift: Created by wings
Drag: Created by airflow
Weight: (created by gravity)
Buoyancy: for lighter than air flight
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