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A fan disk is the part of a turbofan jet engine that contains the fan blades. It is considered one of the most critical components of the engine and has four main functions: * React to centrifugal loads from the fan blades—both during normal operation and during a fan blade off event * Provide attachment from the low pressure (LP) shaft to drive the fan and to retain the fan blades * Absorb impact loads * Provide attachment for the nose cone and other peripheral components Because of the critical nature of this component, a fan disk failure is considered hazardous to the aircraft. They are usually made from a single titanium alloy forging. ==See also== * United Airlines Flight 232, which crashed after the fan disc in its number two engine shattered and damaged all hydraulic systems 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Fan disk」の詳細全文を読む スポンサード リンク
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