Contrails
The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Turbine Engine Compressor Blade Checkout

Report Number: AFAPL TR 67-59
Author(s): Bridges, J. E.; Hegner, H. R.; Knox, R. M.; Schwab, R. B.; Hehn, A. H.
Corporate Author: IIT Research Institute
Laboratory: Air Force Aero Propulsion Laboratory
Date of Publication: 1967-06
Pages: 235
Contract: AF 33(615)-3640
Project: 8119
Task: 811925
AD Number: AD0818274

Abstract:
The ingestion of foreign objects into jet engines causes damage in the compressor assembly which is a major safety-of-flight and maintenance problem. While the engine is installed, the checkout of jet engine compressor rotor blades is a difficult and time consuming operation. Foreign object damage is normally not found until it severely affects engine performance. Therefore, new checkout techniques need to be developed to detect foreign object damage during flight line checkout while the engine is operating. This program was initiated with an objective to demonstrate the feasibility of one or more techniques for a portable flight line checkout system that will determine foreign object damage to the compressor rotor blades of the installed jet engine. The compressor blades are to be inspected without requiring personnel to gain access to the engine front end and while the engine is motoring, idling, and running at 100 percent power or any setting in between.

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