- lifting-line theory
- Морской термин: теория несущей линии
Универсальный англо-русский словарь. Академик.ру. 2011.
lifting-line theory
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Lifting-line theory — or Lanchester Prandtl wing theory was published by Ludwig Prandtl in 1918–1919 after working with Albert Betz and Max Munk on the problem of a useful mathematical tool for examining lift from real world wings. In this model, the vortex strength… … Wikipedia
Sweep theory — is an aeronautical engineering description of the behavior of airflow over a wing when the wing s leading edge encounters the airflow at an oblique angle. The development of sweep theory resulted in the swept wing design used by most modern jet… … Wikipedia
Line-out code — A line out code is a coded piece of information, used to communicate intentions about a line out within one team in a rugby union match without giving information away to the other team. A line out is a manoeuvre used to restart play when the… … Wikipedia
Waterloo & City line — Infobox TfL line Line=Waterloo City ColourName=Teal TextColour=White YearOpened=1898 DeepOrSurface=Deep Tube RollingStock=1992 Tube Stock StationsServed=2 LengthKm=2.5 LengthMiles=1.5 AnnualPassengers=9,616,000 Depots=Waterloo The Waterloo City… … Wikipedia
A¹ homotopy theory — In algebraic geometry and algebraic topology, a branch of mathematics, A1 homotopy theory is a way to apply the techniques of algebraic topology, specifically homotopy, to algebraic varieties and, more generally, to schemes. The theory is due to… … Wikipedia
Knot theory — A three dimensional depiction of a thickened trefoil knot, the simplest non trivial knot … Wikipedia
Lift (force) — For other uses, see Lift. Boeing 747 8F landing A fluid flowing past the surface of a body exerts a surface force on it. Lift is the component of this force that is perpendicular to the … Wikipedia
Vortex lattice method — The Vortex lattice method, (VLM), is a numerical, Computational fluid dynamics, method used mainly in the early stages of aircraft design and in aerodynamic education at university level. The VLM models the lifting surfaces, such as a wing, of an … Wikipedia
Airfoil — An airfoil (in American English) or aerofoil (in British English) is the shape of a wing or blade (of a propeller, rotor or turbine) or sail as seen in cross section. An airfoil shaped body moved through a fluid produces a force perpendicular to… … Wikipedia
Oswald efficiency number — 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 … Wikipedia
Lift coefficient — The lift coefficient ( or ) is a dimensionless coefficient that relates the lift generated by a lifting body, the dynamic pressure of the fluid flow around the body, and a reference area associated with the body. A lifting body is a foil or a… … Wikipedia
