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  2. Lift-to-drag ratio - Wikipedia

    en.wikipedia.org/wiki/Lift-to-drag_ratio

    Lift and drag are the two components of the total aerodynamic force acting on an aerofoil or aircraft. In aerodynamics, the lift-to-drag ratio (or L/D ratio) is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air.

  3. von Kármán–Gabrielli diagram - Wikipedia

    en.wikipedia.org/wiki/Von_Kármán–Gabrielli...

    The power is equal to the drag force times velocity. For aircraft in cruise flight the lift is equal to the weight (L=mg) and the engine thrust is equal to the drag (T=D). Hence, ϵ = P / ( m g v ) = D / L = 1 / f {\displaystyle \epsilon =P/(mgv)=D/L=1/f} , with f=L/D the lift-to-drag ratio , so the specific resistance of airplanes is roughly ...

  4. Drag curve - Wikipedia

    en.wikipedia.org/wiki/Drag_curve

    The drag curve or drag polar is the relationship between the drag on an aircraft and other variables, such as lift, the coefficient of lift, angle-of-attack or speed. It may be described by an equation or displayed as a graph (sometimes called a "polar plot"). [ 1 ]

  5. Clark Y airfoil - Wikipedia

    en.wikipedia.org/wiki/Clark_Y_airfoil

    Clark Y is the name of a particular airfoil profile, widely used in general purpose aircraft designs, and much studied in aerodynamics over the years. The profile was designed in 1922 by Virginius E. Clark using thickness distribution of the German-developed Goettingen 398 airfoil. [1]

  6. Lift coefficient - Wikipedia

    en.wikipedia.org/wiki/Lift_coefficient

    It is also useful to show the relationship between section lift coefficient and drag coefficient. The section lift coefficient is based on two-dimensional flow over a wing of infinite span and non-varying cross-section so the lift is independent of spanwise effects and is defined in terms of ′, the lift force per unit span of the wing. The ...

  7. File:Coefficients of Drag and Lift vs AOA.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Coefficients_of_Drag...

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