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  2. Aspect ratio (aeronautics) - Wikipedia

    en.wikipedia.org/wiki/Aspect_ratio_(aeronautics)

    Aspect ratio (aeronautics) An ASH 31 glider with very high aspect ratio (AR=33.5) and lift-to-drag ratio (L/D=56) In aeronautics, the aspect ratio of a wing is the ratio of its span to its mean chord. It is equal to the square of the wingspan divided by the wing area. Thus, a long, narrow wing has a high aspect ratio, whereas a short, wide wing ...

  3. Wing configuration - Wikipedia

    en.wikipedia.org/wiki/Wing_configuration

    Wing configuration. The Spitfire wing may be classified as: "a conventional low-wing cantilever monoplane with unswept elliptical wings of moderate aspect ratio and slight dihedral". The wing configuration of a fixed-wing aircraft (including both gliders and powered aeroplanes) is its arrangement of lifting and related surfaces.

  4. Chord (aeronautics) - Wikipedia

    en.wikipedia.org/wiki/Chord_(aeronautics)

    The ratio of the length (or span) of a rectangular-planform wing to its chord is known as the aspect ratio, an important indicator of the lift-induced drag the wing will create. [7] (For wings with planforms that are not rectangular, the aspect ratio is calculated as the square of the span divided by the wing planform area.)

  5. Bird wing - Wikipedia

    en.wikipedia.org/wiki/Bird_wing

    Aspect ratio is the ratio of wingspan to the mean of its chord (or the square of the wingspan divided by wing area). Wing loading is the ratio of weight to wing area. Most kinds of bird wings can be grouped into four types, with some falling between two of these types. These types of wings are elliptical wings, high-speed wings, high aspect ...

  6. Bird flight - Wikipedia

    en.wikipedia.org/wiki/Bird_flight

    Aspect ratio is the ratio of wingspan to the mean of its chord (or the square of the wingspan divided by wing area). A high aspect ratio results in long narrow wings that are useful for endurance flight because they generate more lift. [24] Wing loading is the ratio of weight to wing area. Most kinds of bird wing can be grouped into four types ...

  7. Lift-induced drag - Wikipedia

    en.wikipedia.org/wiki/Lift-induced_drag

    For a given wing area, a high aspect ratio wing will produce less induced drag than a wing of low aspect ratio. [16] While induced drag is inversely proportional to the square of the wingspan, not necessarily inversely proportional to aspect ratio, if the wing area is held constant, then induced drag will be inversely proportional to aspect ...

  8. Oswald efficiency number - Wikipedia

    en.wikipedia.org/wiki/Oswald_efficiency_number

    The Oswald efficiency is defined for the cases where the overall coefficient of drag of the wing or airplane has a constant+quadratic dependence on the aircraft lift coefficient. where. For conventional fixed-wing aircraft with moderate aspect ratio and sweep, Oswald efficiency number with wing flaps retracted is typically between 0.7 and 0.85 ...

  9. Wingtip vortices - Wikipedia

    en.wikipedia.org/wiki/Wingtip_vortices

    Wingtip vortices are circular patterns of rotating air left behind a wing as it generates lift. [1]: 5.14 The name is a misnomer because the cores of the vortices are slightly inboard of the wing tips. [2]: 369 Wingtip vortices are sometimes named trailing or lift-induced vortices because they also occur at points other than at the wing tips.