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Results of winglet development studies for DC-10 derivativesThe results of investigations into the application of winglets to the DC-10 aircraft are presented. The DC-10 winglet configuration was developed and its cruise performance determined in a previous investigation. This study included high speed and low speed wind tunnel tests to evaluate aerodynamic characteristics, and a subsonic flutter wind tunnel test with accompanying analysis and evaluation of results. Additionally, a configuration integration study employed the results of the wind tunnel studies to determine the overall impact of the installation of winglets on the DC-10 aircraft. Conclusions derived from the high speed and low speed tests indicate that the winglets had no significant effects on the DC-10 stability characteristics or high speed buffet. It was determined that winglets had a minimal effect on aircraft lift characteristics and improved the low speed aircraft drag under high lift conditions. The winglets affected the DC-10 flutter characteristics by reducing the flutter speed of the basic critical mode and introducing a new critical mode involving outer wing torsion and longitudinal bending. The overall impact of winglets was determined to be of sufficient benefit to merit flight evaluation.
Document ID
19850002628
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Shollenberger, C. A.
(Douglas Aircraft Co., Inc. Long Beach, CA, United States)
Humphreys, J. W.
(Douglas Aircraft Co., Inc. Long Beach, CA, United States)
Heiberger, F. S.
(Douglas Aircraft Co., Inc. Long Beach, CA, United States)
Pearson, R. M.
(Douglas Aircraft Co., Inc. Long Beach, CA, United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1983
Publication Information
Publisher: NASA
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
NAS 1.26:3677
NASA-CR-3677
ACEE-17-FR-1682
Accession Number
85N10936
Funding Number(s)
CONTRACT_GRANT: NAS1-15327
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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