An overview of the disk life prediction and verification program, which includes very special disk fatigue test equipment called the Ferris Wheel, is described. This rig has been designed to simulate the effect of centrifugal force of blades on jet engine disk and is capable of doing LCF test in a very short time; (the period required for a Ferris Wheel test is one tenth that of a cyclic spinning test). This feature enables us to evaluate actual disk LCF life statistically and improve the reliability of disk LCF life predicted. An example problem is also included and the procedure of the evaluation of the disk life described in detail.
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