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autobrake
An autobrake is a type of automatic wheel-based hydraulic brake system for advanced airplanes. The autobrake is normally enabled during takeoff and landing procedures, when the aircraft's longitudinal deceleration system can be handled by the automated systems of the aircraft itself in order to keep the pilot free to perform other tasks.
==Landing==
While landing, the autobrake can aid in freeing up the pilot to allow him or her to monitor other systems (such as the execution of the landing flare). There are usually several settings for the "intensity," or hydraulic pressure of the brake mechanism. The selection of these settings are normally done on the aircraft instrument panel before landing. These are often numbered or labelled, with "1" or "LO" referring to braking for a light speed reduction, and subsequent numbers or designations up to "MAX" referring to more abrupt speed reductions.
When the landing feature of the autobrake is engaged, the aircraft automatically engages pressurized wheel braking upon touchdown to the landing surface. During the roll out, application of the brake pedals transfers control back to the pilot.
One of the main advantages of engaging the autobrake as opposed to manually pressing on brake pedals is the uniform deceleration mechanism of the autobrake. The aircraft automatically decelerates at the selected level regardless of other factors, such as aircraft drag and other deceleration methods such as deployment of thrust reversers or spoilers.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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