NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Low Sonic Boom Design Activities at BoeingLow sonic boom studies have continued during the last year with the goal of exploring the ability of practical airplane designs to achieve significantly reduced sonic boom-loudness with reasonable performance penalties. At the 1993 Sonic Boom Workshop, improvements to the low-boom design methods were described and early results of two low-boom configurations -935 and -936) were presented. Now that the low boom design methods are reasonably mature, recent design activities have broadened somewhat to explore refinements to the -935 and -936 designs. In this paper the results are reported of a detailed systems study and performance sizing of the -935 (Hybrid sonic boom waveform) and the -936 (Flat-top waveform). This analysis included a second design cycle for reduced cruise drag and balance considerations. Another design study was of a small-wing version of the -935. Finally, some preliminary results of the recent LARC UPWT test of the -935 configuration are given, along with a proposed alternative method for extrapolating wind tunnel pressure signatures to the ground. The various configurations studied is also summarized. The topics covered by this paper are as follows: Systems study results of the Baseline -939 and low boom configurations -935 and -936, Small wing derivative of the -935, Wind tunnel test results of the -935, Test-derived F-function and propagation to the ground, and Future considerations (boom-softened baseline, overwater issues, and operations).
Document ID
20000027445
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Haglund, George T.
(Boeing Commercial Airplane Co. Seattle, WA United States)
Date Acquired
August 19, 2013
Publication Date
December 1, 1999
Publication Information
Publication: High-Speed Research: 1994 Sonic Boom Workshop. Configuration, Design, Analysis and Testing
Subject Category
Acoustics
Funding Number(s)
CONTRACT_GRANT: NAS1-19360
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available