Editing Takeoff (section)

===Power settings===
For [[light aircraft]], usually full power is used during takeoff. Large [[transport category]] (airliner) aircraft may use a [[flex temp|reduced power]] for takeoff, where less than full power is applied in order to prolong engine life, reduce maintenance costs and reduce noise emissions. In some emergency cases, the power used can then be increased to increase the aircraft's performance. Before takeoff, the engines, particularly [[piston engine]]s, are routinely run up at high power to check for engine-related problems. The aircraft is permitted to accelerate to rotation speed (often referred to as V<sub>r</sub>). The term ''[[Rotation (aeronautics)|rotation]]'' is used because the aircraft pivots around the axis of its main [[landing gear]] while still on the ground, usually because of gentle manipulation of the [[Aircraft flight control system|flight controls]] to make or facilitate this change in [[aircraft attitude]] (once proper air displacement occurs under / over the wings, an aircraft will lift off on its own; controls are to ease that in).

The nose is raised to a nominal 5[[degree (angle)|°]]&ndash;15° nose up [[flight dynamics|pitch]] attitude to increase lift from the [[wing]]s and effect liftoff. For most aircraft, attempting a takeoff without a pitch-up would require cruise speeds while still on the runway.
[[File:Three way take off at Beijing Capital International Airport.jpg|thumb|left|Three airliners taking off simultaneously (note similar pitch attitudes)]]
Fixed-wing aircraft designed for high-speed operation (such as commercial [[jet aircraft]]) have difficulty generating enough lift at the low speeds encountered during takeoff. These are therefore fitted with [[high-lift device]]s, often including [[Leading edge slats|slats]] and usually [[flap (aircraft)|flaps]], which increase the [[Camber (aerodynamics)|camber]] and often area of the wing, making it more effective at low speed, thus creating more lift. These are deployed from the wing before takeoff, and retracted during the climb. They can also be deployed at other times, such as before landing.