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The Lanchester-Prandtl lifting-line theory [1] is a mathematical model in aerodynamics that predicts lift distribution over a three-dimensional wing from the wing's geometry. [2] The theory was expressed independently [3] by Frederick W. Lanchester in 1907, [4] and by Ludwig Prandtl in 1918–1919 [5] after working with Albert Betz and Max Munk ...
The almost uniform lift distribution of a constant-aerofoil section elliptical wing can cause the entire span of the wing to stall simultaneously, potentially causing loss of control with little warning. To improve the stalling characteristics and give the pilot some warning, designers use a non-uniform aerofoil.
The acronym is a reference to early German Aerospace Engineer Ludwig Prandtl, whose theory of the bell-shaped lift distribution deeply influenced Bowers. [ 2 ] The Prandtl-D1 and the Prandtl-D3 models are preserved in the National Air and Space Museum and the California Science Center , respectively.
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 definition becomes
In bodycam footage obtained and published by Fox 4, Collin is heard speaking to his grandmother as he sits in a police car following an arrest in November 2023. "I was saying, ‘Mom, I’m not a ...
The Oswald efficiency, similar to the span efficiency, is a correction factor that represents the change in drag with lift of a three-dimensional wing or airplane, as compared with an ideal wing having the same aspect ratio and an elliptical lift distribution. [1]
Commenter Sabrina called him a "Formula 1 race car," while @kitsandcaboodles thought he sounded more like "the fiercest kazoo." Another person said he reminds them of a weed whacker!
Richard C. Miller/Donaldson Collection/Getty. Elizabeth Taylor and James Dean on the set of 'Giant' in 1955.
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