Powered flight
Powered flight is flight
Flight is the process by which an object moves either through an atmosphere or beyond it by generating lift or propulsive thrust, or aerostatically using buoyancy, or by simple ballistic movement....

 (travel through the air) achieved using onboard power to generate propulsive thrust and/or lift. Birds and insects use wing
A wing is an appendage with a surface that produces lift for flight or propulsion through the atmosphere, or through another gaseous or liquid fluid...

s, in a variety of ways, to achieve powered flight. Man has developed several forms of powered aircraft
Powered aircraft
A powered aircraft is an aircraft that uses onboard propulsion. This requires a power source, and some method of coupling the power to the air in order to create a forward force or thrust...

. The term powered flight is also sometimes used excluding the natural world - e.g. "'The era of powered flight was opened by the Wright brothers.".
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.