Flow measurements taken on the rotors of turbomachines are of great value for improved understanding and advancement of design techniques. On-rotor experiments have been limited in the past because of instrumentation problems, especially with the data transmission system. Recent advances in miniature electronic systems and transducer technology have produced a renewed interest in this area. These considerations are discussed, and research on a telemetry-type data transmission system is described with experimental verification using a strain gage on an axial-flow fan blade.

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