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:
“Methods of thought which claim to give the lead to our world in the name of revolution have become, in reality, ideologies of consent and not of rebellion.”
—Albert Camus (1913–1960)
“The greatest part of our faults are more excusable than the methods that are commonly taken to conceal them.”
—François, Duc De La Rochefoucauld (1613–1680)
“Men, forever tempted to lift the veil of the future—with the aid of computers or horoscopes or the intestines of sacrificial animals—have a worse record to show in these “sciences” than in almost any scientific endeavor.”
—Hannah Arendt (1906–1975)