X353-5B PROPULSION SYSTEM FLIGHTWORTHINESS TEST REPORT. VOLUME 1
GENERAL ELECTRIC CO CINCINNATI OH FLIGHT PROPULSION LAB DEPT
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An X353-5B propulsion system comprised of two J85-GE-5 turbojet engines without afterburners, two X353-5B diverter valves, one X353-5 lift fan and one X376 pitch trim control fan was assembled and tested. The specified testing was completed. The J85 gas generators were unaffected by the presence of the X353-5B propulsion system. The diverter valves and the pitch fan met or exceeded performance requirements at all operating conditions. The lift fan met or exceeded performance requirements at all but one condition single engine lift. There were only minor discrepancies found in the diverter valve and pitch fan hardware at disassembly. The lift fan had considerable damage resulting from the shedding of a small metal tab from the rotor during the last endurance cycle of the test. Lift fan aluminum inlet vanes and exit louvers were of generally poor manufacturing quality and did not satisfactorily complete the test. It was recommended that a flightworthiness rating be assigned to the X353-5B propulsion system upon satisfactory completion of a 10-hour penalty test of new lift fan inlet vanes and exist louvers.
- Research and Experimental Aircraft
- Jet and Gas Turbine Engines