Accession Number : ADA328539

Title :   NASA Boeing 757 Cavity Field Variability Based on Boeing 757 and Boeing 707 Test Data.

Descriptive Note : Final rept.

Corporate Author : NAVAL SURFACE WARFARE CENTER DAHLGREN VA

Personal Author(s) : Hatfield, Michael O. ; Johnson, Mark D. ; Freyer, Gustav J. ; Slocum, Michael B.

PDF Url : ADA328539

Report Date : JAN 1997

Pagination or Media Count : 29

Abstract : The NASA Langley Research Center conducted an extensive ground and flight test program to validate detailed modeling of the Boeing 757 aircraft. Most of the ground and flight test data were obtained using D-dot probes in fixed locations in the cockpit, electronics bay, and passenger cabin. An open question was the uncertainties that may be expected for the comparison of experimental measurements and model predictions. The Naval Surface Warfare Center, Dahlgren Division and the USAF Phillips Laboratory had performed cavity characterization tests on the same Boeing 757 as used for the flight tests. Extensive cavity characterization data was also available for a Boeing 707 aircraft. While the three specific flight test comparison frequencies were not investigated in these tests, sufficient data were available to provide estimates of the expected uncertainties. Some of the data in the cavity characterization tests were collected with the flight test D-dot probes in the same locations. A summary of the results is presented as a standard deviation in decibels in a series of tables for each cavity and each frequency.

Descriptors :   *AVIONICS, *FLIGHT TESTING, *COMMERCIAL AIRCRAFT, *JET TRANSPORT AIRCRAFT, TEST AND EVALUATION, COCKPITS, COMMERCIAL AVIATION, NOISE REDUCTION, AIRCRAFT MODELS, NOISE(ELECTRICAL AND ELECTROMAGNETIC), BAYS(STRUCTURAL UNITS), AIRCRAFT CABINS.

Subject Categories : Transport Aircraft
      Commercial and General Aviation

Distribution Statement : APPROVED FOR PUBLIC RELEASE