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3.3.1: Geometry and nomenclature

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    截屏2022-01-15 下午3.00.40.png
    Figure 3.20: Wing geometry

    In order to characterize the geometry and nomenclature of a typical commercial aircraft wing, the following wing elements are illustrated in Figure 3.20:

    • Wingspan \(b\).
    • Chords: root chord \(c_r\) and tip chord \(c_t\).
    • Leading and trailing edges, and the line corresponding to the locus of \(c/4\) points.
    • \(c/4\) swept \(\wedge_{c/4}\).

    The area enclosed into the leading and trailing edge and the marginal borders (the section with \(c_r\)) view in a plant-form is referred to as wet wing surface \(S_w\). The quotient between the wet wing surface and the wingspan is referred to as the geometric mean chord \(\bar{c}\). which represents the mean chord that a rectangular wing with the same \(b\) and \(S_w\) would have.

    The enlargement, \(A\), is defined as:

    \[A = \dfrac{b}{\bar{c}} = \dfrac{b^2}{S_w}.\]

    There is also a parameter measuring the narrowing of the wing: \(\lambda = c_t / c_r\).

    3.3.1: Geometry and nomenclature is shared under a CC BY-SA 3.0 license and was authored, remixed, and/or curated by Manuel Soler Arnedo via source content that was edited to conform to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.

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