Methods of Powering Lift
A fixed-wing aircraft obtains lift from airflow over the wing resulting from motion due to forward thrust. A few other types, such as the rotary-winged autogyro, obtain lift through similar methods.
Some types use a separate power system to create lift. These include the rotary-winged helicopter and craft that use lift jets (e.g. the flying bedstead).
A hot air balloon requires a power source (normally a gas burner) for lift, but is not normally considered a "powered aircraft".
Read more about this topic: Powered Flight
Famous quotes containing the words methods of, methods and/or lift:
“I conceive that the leading characteristic of the nineteenth century has been the rapid growth of the scientific spirit, the consequent application of scientific methods of investigation to all the problems with which the human mind is occupied, and the correlative rejection of traditional beliefs which have proved their incompetence to bear such investigation.”
—Thomas Henry Huxley (1825–95)
“If you want to know the taste of a pear, you must change the pear by eating it yourself.... If you want to know the theory and methods of revolution, you must take part in revolution. All genuine knowledge originates in direct experience.”
—Mao Zedong (1893–1976)
“I pray every single second of my life; not on my knees, but with my work. My prayer is to lift woman to equality with man. Work and worship are one with me. I can not imagine a God of the universe made happy by my getting down on my knees and calling him “great.””
—Susan B. Anthony (1820–1906)