Accession Number:

AD0763596

Title:

727 Noise Retrofit Feasibility. Volume II. Upper Goal Design, Fabrication, and Ground Testing.

Descriptive Note:

Final rept. Jul 71-Nov 72,

Corporate Author:

BOEING COMMERCIAL AIRPLANE CO SEATTLE WASH

Report Date:

1972-11-01

Pagination or Media Count:

116.0

Abstract:

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 ejectorsuppressor 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

Subject Categories:

  • Civilian Aircraft
  • Acoustics
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE