The primary purpose of this test program was to measure the acoustic environment in the hush house facility located at Kelly Air Force Base, Texas, during operation of the F-4E aircraft to ensure that aircraft structural acoustic design limits were not exceeded. The acoustic measurements showed that sonic fatigue problems are anticipated with the F-4E aircraft aft fuselage structure during operation in the hush house. The measured acoustic levels were less than those measured in an F-4E aircraft water-cooled hush house at Hill AFB in the lower frequencies, but were increased over that measured during ground run-up on some areas of the aircraft. It was recommended that the acoustic loads measured in this program should be specified in the structural design criteria for aircraft which will be subjected to hush house operation or defining requirements for associated equipment. Recommendations were also made to increase the fatigue life of the aft fuselage. (Author)
Acoustic Measurements of F-4E Aircraft Operating in Hush House, NSN 4920-02-070-2721
1981
105 pages
Report
Keine Angabe
Englisch
Jet & Gas Turbine Engines , Aircraft , Noise reduction , Jet engine noise , Acoustic measurement , Test facilities , Air cooled , Water cooling , Acoustic absorption , Sound pressure , Ground level , Sonic fatigue , Jet fighters , Fatigue life , Fuselages , Structural properties , Suppression , Deflectors , Air Force facilities , Texas , Hush houses , Ground runup , F-4 aircraft , F-4E aircraft , Noise suppression , Acoustic loads , WUAFWALAFLC8102
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Hush-hush project from Magirus
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