thrust lever
Thrust lever of a Boeing 727
The thrust levers of an aircraft are those levers that control the thrust or the power of the engines. The pushing force is increased by pushing forward the push lever (s). The thrust levers are usually located in the center console or for small aircraft below or in the dashboard (panel) of the cockpit. They often have the form of a pull button. In a few aircraft, the thrust levers are mounted over the pilot's head, Eg DHC-4 Caribou, DHC-5 Buffalo and DHC-6 Twin Otter from de Havilland Canada or the Zeppelin NT
The thrust levers work mechanically via linkages or cable pulls, or electrically or electronically, to the power setting actuator on the engine, such as the carburetor throttle valve for piston engines or the turbine controller or the FADEC.
Normally, there is a thrust regulator per engine. In the three-jet MD-11, there are three, with a Boeing 777, which has two engines, there are two, to name a few examples.
With the push levers or auxiliary levers attached to their front, the pilots can activate the reversal of the thrust following the set-up on the slope to support the wheel brakes. In addition, thrusters in larger aircraft often have switches to turn off the automatic thrust control or to activate the autopilot's start / overrun mode without having to take the hand off the levers.
In the case of propeller engines, the levers for the speed preselection of the variable pitch propellers (usually in blue color) are often found on the thrust bracket, in addition the mixing lever or the mixture levers for adjusting the air / fuel mixing ratio (usually with red levers) / p> Automatic Thrust Control Edit the source text
For most major commercial aircraft, the thrusters are equipped with an automatic thrust control (autothrottle / autothrust), which electrically shifts them. With the current models from Airbus (A318 to A380), the system for automatic thrust control engages directly in the engine electronics; here the thrust levers are locked in different fixed positions and remain there until the automatic thrust control is deactivated again. Due to this construction, it is not possible to detect which thrust is present and which thrust changes are occurring in the autothrust mode on the basis of the thrust lever displacement; these values must be read from the engine data display. Weblinks Edit sourcetext
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