727 Noise Retrofit Feasibility. Volume II. Upper Goal Design, Fabrication, and Ground Testing.
Final rept. Jul 71-Nov 72,
BOEING COMMERCIAL AIRPLANE CO SEATTLE WASH
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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
- Civilian Aircraft
- Jet and Gas Turbine Engines