Accession Number:

AD0611744

Title:

TESTS OF PRATT AND WHITNEY MODEL YTF33-P-1 TURBOFAN ENGINE CHARACTERISTICS DURING BIRD INGESTION.

Descriptive Note:

Final rept.,

Corporate Author:

FEDERAL AVIATION ADMINISTRATION WASHINGTON D C SYSTEMS RESEARCH AND DEVELOPMENT SERVICE

Personal Author(s):

Report Date:

1965-01-01

Pagination or Media Count:

27.0

Abstract:

Various quantities of birds were propelled into the engine inlet at velocities on the order of 125 knots by a compressed air gun. An abrupt fluctuation in engine performance was sustained in all tests conducted with subsequent engine recovery and stabilization being attained in periods ranging from approximately 1 to 3 seconds. Residual contamination of the engine resulted in some decrease in overall engine efficiency however, preingestion power levels could be regained through a minor increase in fuel flow. Large quantities of bird remains were discharged from the fan ducts during each ingestion run regardless of the bird-impact points relative to the engine horizontal axis. This action was attributed to the centrifuging action of the fan section which indicated that a forward-fan configuration would tend to minimize adverse enginecompressor contamination effects induced during a bird-ingestion incident. Substantial damage was incurred by the first-stage fan rotor blades in the course of the program. Although this damage did not impair or prevent continued engine operation, the occurrence of such damage in service would require repair prior to continued flight operation.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE