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  2. 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 ]

  3. Lift-to-drag ratio - Wikipedia

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

    Drag vs Speed. L/DMAX occurs at minimum Total Drag (e.g. Parasite plus Induced) Coefficients of drag C D and lift C L vs angle of attack. Polar curve showing glide angle for the best glide speed (best L/D). It is the flattest possible glide angle through calm air, which will maximize the distance flown.

  4. Drag coefficient - Wikipedia

    en.wikipedia.org/wiki/Drag_coefficient

    Drag coefficients in fluids with Reynolds number approximately 10 4 [1] [2] Shapes are depicted with the same projected frontal area. In fluid dynamics, the drag coefficient (commonly denoted as: , or ) is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment, such as air or water.

  5. File:Drag curves for aircraft in flight.svg - Wikipedia

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

    The lift-induced drag decreases with the square of velocity. As a result, the total drag (the sum of both components) typically has a minimum value. In practice, the validity of these curves is limited by the occurrence of stall on the left side, and by compressibility effects on the right side.

  6. Lift-induced drag - Wikipedia

    en.wikipedia.org/wiki/Lift-induced_drag

    Induced drag must be added to the parasitic drag to find the total drag. Since induced drag is inversely proportional to the square of the airspeed (at a given lift) whereas parasitic drag is proportional to the square of the airspeed, the combined overall drag curve shows a minimum at some airspeed - the minimum drag speed (V MD). An aircraft ...

  7. Drag-divergence Mach number - Wikipedia

    en.wikipedia.org/wiki/Drag-divergence_Mach_number

    This increase can cause the drag coefficient to rise to more than ten times its low-speed value. The value of the drag-divergence Mach number is typically greater than 0.6; therefore it is a transonic effect. The drag-divergence Mach number is usually close to, and always greater than, the critical Mach number.

  8. von Kármán–Gabrielli diagram - Wikipedia

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

    A Gabrielli–von Karman diagram with the y-axis being the lift-to-drag ratio, which is the inverse of specific resistance. The von Kármán–Gabrielli diagram (also Gabrielli–von Kármán diagram , GvK diagram ) is a diagram which compares the efficiency of transportation methods by plotting specific tractive force , or specific resistance ...

  9. External ballistics - Wikipedia

    en.wikipedia.org/wiki/External_ballistics

    The first reference drag curve is based purely on the Siacci/Mayevski retardation rate function. The second reference drag curve is adjusted to equal the Siacci/Mayevski retardation rate function at a projectile velocity of 2600 fps (792.5 m/s) using a .30-06 Springfield Cartridge, Ball, Caliber .30 M2 152 grains (9.8 g) rifle spitzer bullet ...