A study was conducted to define specific ground-to-flight effects on the noise of a low-bypass-ratio engine. The analysis was based on acoustic data recorded during the FAA-sponsored 727 Noise Retrofit Feasibility Program. Two configurations, a baseline and an ejector suppressor nacelle, were included in the study. Noise flight effects were obtained by comparing JT8D ground static and 727/JT8D flight acoustic data. Procedures are defined for normalizing static and flight data to common conditions. The analysis considered both jet and fan noise characteristics for five engine power settings. The results of this study will provide a guideline for establishing flight effects technology. (Author)

  • Corporate Authors:

    Boeing Company

    P.O. Box 3707, Commercial Airplane Group
    Seattle, WA  United States  98124
  • Authors:
    • Munoz, L F
  • Publication Date: 1976-8

Media Info

  • Pagination: 295 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00146993
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FAA-RD-76-110 Final Rpt., D6-44145
  • Contract Numbers: DOT-FA71WA-2637
  • Files: NTIS, TRIS
  • Created Date: Feb 16 1977 12:00AM