727 NOISE RETROFIT FEASIBILITY. VOLUME II. UPPER GOAL DESIGN, FABRICATION, AND GROUND TESTING

The work performed in phase 2 of the contract was development, design, fabrication, and ground testing of a flightworthy quiet-nacelle configuration conforming to the FAA upper noise-reduction goals for the 727 airplane. The quiet-nacelle configuration tested consists of a double-ring, acoustically treated, side engine inlet; acoustically treated engine fan duct; and a multilobe, variable-geometry ejector/suppressor in the engine exhaust system. This quiet-nacelle configuration was ground tested to obtain comparative acoustic and performance data with the production-baseline nacelle. A direct operating cost (DOC) analysis was prepared based on preliminary retrofit installation cost estimates and predicted airplane performance analyses. In addition, a retrofit kit and installation package were developed to obtain realistic retrofit kit prices, installation costs, and maintenance costs to facilitate the final update of the direct operating cost analysis. (Author)

• Supplemental Notes:
  • See also Volume 1, AD-756 040.
• Corporate Authors:

  Boeing Company

  Commercial Airplane Division, P.O. Box 3707
  Seattle, WA  United States  98124
• Authors:
  • Anderson, J R
  • Ridley, H G
  • Smith, J W
• Publication Date: 1972-11

Media Info

• Pagination: 116 p.

Subject/Index Terms

• TRT Terms: Acoustic impedance; Acoustic materials; Aircraft noise; Civil aircraft; Costs; Damping (Engineering); Design; Flight tests; Honeycomb structures; Jet engines; Nacelles; Noise control; Nozzles; Sandwich construction; Turbojet engines
• Identifier Terms: Boeing 727 aircraft; U.S. Federal Aviation Administration
• Uncontrolled Terms: Aging aircraft; Noise reduction
• Old TRIS Terms: Acoustic panels; Commercial planes; Faa; Honeycomb cores; Jet engine nacelles; Jet engine noise; Jt-8 engines; Jt-8d engines; Noise suppressors
• Subject Areas: Aviation; Design; Finance; Vehicles and Equipment;

Filing Info

• Accession Number: 00047855
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: D6-60175 Final Rpt
• Contract Numbers: DAT-FA71WA-2637
• Files: NTIS
• Created Date: Oct 18 1973 12:00AM