Accession Number : AD0776127

Title :   DC-9 Noise Retrofit Feasibility. Volume I. Lower Goal Noise, Performance and Cost Evaluation.

Descriptive Note : Final rept. Jan 72-May 73,

Corporate Author : DOUGLAS AIRCRAFT CO LONG BEACH CA

Personal Author(s) : Dunbar, W. R.

Report Date : NOV 1973

Pagination or Media Count : 188

Abstract : The report covers the work performed in Phase 1, ground test and flight test, of the program. Exhaust system development tests were conducted on an engine static test stand to evaluate the lower goal exhaust system. Prototype components of the lower goal nacelle were designed and fabricated. The prototype components were tested for effect on engine performance and noise, and for effect on the compatibility with the JT8D engine. A 100-hour durability test was performed, cycling the prototype nacelle through an accelerated simulated duty mission. A complete loads and stress analysis of the nacelle/airframe structure was performed. The inlet was tested in the icing tunnel for anti-icing bleed requirements and was tested for structural capability to withstand hail and bird impact. A 20% thrust coefficient model was tested over a range of engine pressure ratios.

Descriptors :   *AIRCRAFT NOISE, *NOISE REDUCTION, *EXHAUST SYSTEMS, *CONTROL SYSTEMS, ENGINE NACELLES, TEST METHODS, STATIC TESTS, FLIGHT TESTING, PERFORMANCE(ENGINEERING), JET TRANSPORT AIRCRAFT, COST ANALYSIS, THRUST, ENDURANCE(GENERAL).

Subject Categories : Noise Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE