727/JT8D JET AND FAN NOISE FLIGHT EFFECTS STUDY

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

• TRT Terms: Aircraft noise; Ejectors; Fans; Flight tests; Installation; Jet engines; Jet transports; Nacelles; Noise; Noise control; Shape; Static tests; Suppressors; Turbofan engines
• Identifier Terms: Boeing 727 aircraft
• Uncontrolled Terms: Configuration; Noise reduction
• Old TRIS Terms: Axial flow fans; Ejector supressors; External stores; Flight noise; Jet engine nacelles; Jet engine noise; Pratt and whitney jt8d engine
• Subject Areas: Aviation; Environment; Maintenance and Preservation; Vehicles and Equipment;

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