Accession Number:

AD0668834

Title:

INVESTIGATION OF TURBOPROP ENGINE CHARACTERISTICS DURING BIRD INGESTION.

Descriptive Note:

Final rept.,

Corporate Author:

NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J

Personal Author(s):

Report Date:

1968-04-01

Pagination or Media Count:

20.0

Abstract:

Tests were conducted to determine specific reactions to the ingestion of small birds by a free turbine turboprop engine. Transient and steady-state engine performance was monitored and recorded during and following ingestion sequences. In general, a deterioration in engine performance was indicated upon ingestion of birds or portions thereof. Subsequent engine recovery and stabilization to operating levels below preingestion values were attained in periods from 2 to 4 seconds. Operating levels were reduced as much as 50 percent and were in general a function of the quantity of starlings which entered the inlet duct. Following multiple bird ingestion tests, the degree of inlet blockage prevented preingestion power levels from being attained. No evidence of engine flameout was recorded during any of the 16 test runs conducted, nor was any autofeathering signal indicated. There was no visible damage sustained by the engine which could be attributed to bird impact. Author

Subject Categories:

  • Aircraft
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE