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A Theoretical Investigation on the Conditions of Minimum Induced Drag of Closed Wing Systems and C-Wings
Luciano Demasi
- Vol. 44, Iss: 1, pp 81-99
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The article was published on 2007-01-01 and is currently open access. It has received 8 citations till now. The article focuses on the topics: Lift-induced drag & Wing.read more
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Advanced beam formulations for free-vibration analysis of conventional and joined wings
TL;DR: In this paper, the beam models are obtained by assuming higher-order (up to fourth) expansions for the unknown displacement variables over the cross-section, which allows bending/torsion modes to be coupled and capture any other vibration modes that require in-plane and warping deformation of the beam sections to be detected.
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Invariant Formulation for the Minimum Induced Drag Conditions of Nonplanar Wing Systems
TL;DR: In this article, a configuration-invariant analytical formulation for the induced drag minimization of single-wing nonplanar systems is presented under the hypotheses of linear potential flow and rigid wake aligned with the freestream.
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Minimum Induced Drag Theorems for Joined Wings, Closed Systems, and Generic Biwings: Theory
TL;DR: It is shown for the first time that the augmented Munk's minimum induced drag theorem is also applicable to closed systems, joined wings and generic biwings, and the nonuniqueness of the optimal circulation for a closed wing system is rigorously addressed.
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Minimum Induced Drag Theorems for Joined Wings, Closed Systems, and Generic Biwings: Applications
TL;DR: It is numerically verified that a quasi-closed C-wing presents the same optimal induced drag and circulation of the corresponding closed system, and it is shown that there are an infinite number of equivalent solutions obtained by adding an arbitrary constant to a reference optimal circulation.
Journal ArticleDOI
Analytic study of the conditions required for longitudinal stability of dual-wing aircraft
TL;DR: A new analytic model is developed, which takes into account the downwash from the two main wings and is sensitive to three important design variables: the relative areas of each wing, the streamwise separation of the wings, and the center of gravity position.