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
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