Fan disk

A single stage fan was developed to produce high thrust and act as a multi-bladed propeller.

Fan disks are attached to a shaft that is driven by a multistage Low Pressure Turbine (LPT) to reduce mechanical stress.

Because of their size and weight, a failed fan disk can severely damage an aircraft, as happened with United Airlines Flight 232 in 1989.

[6] Fan disks are usually made of a titanium alloy, which is strong, light weight, and resistant to corrosion.

Muhammad Adnan, Liu Shujiel; FEA Analysis and Fatigue Life Prediction of Aircraft Turbine Disk; North American Academic Research, 4(4) 10-19, Apr 2021, https://doi.org/10.5281/zenodo.4670446 [1]

Diagram of a fan disk
Fan disk assembly diagram, showing one blade and attachment hardware
Cross section of fan disk
Failed fan disk recovered from the center engine of UAL 232.