Fan disk
This article is about part of a turbofan jet engine. For the video game–related package of additional content, see fan disc.
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
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