Preliminary investigation in J33 turbojet engine of several root designs for ceramal turbine blades

Deutsch, George C., Meyer, Andre J., Jr., Morgan, William C.

The practicability of using ceramals with comparatively low strategic material content for the blades of aircraft turbines was determined in an experimental investigation. Four blade root configurations were examined. The most favorable results were obtained for ceramal turbine blades with single serration interlock and dovetail root configurations. Six of the interlock type were operated in a J33-A-33 engine for 68 hr, 23 min at rated service speed and six of the dovetail type were operated for 58 hr, 28 min at rated speed. This result confirms the conclusions of previous static design studies.

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