drag

i. That component of aerodynamic forces acting on the wing or the airfoil section, which is parallel and opposite to the relative airflow. The sources of drag are the pressure distribution patterns over the airfoil, called induced drag; the skin friction of the surface; and other factors like the shape of the airfoil. Total drag is the sum total of induced drag and parasite drag. Drag (D) = Coefficient of drag (CD ) × 1/2 density (ρ) × square of relative speed (V2 ) × surface area (S); or D = CDq S, where D is the drag, q the dynamic pressure (1/2ρV2 ), and S the surface area.
ii. The fore-and-aft movement of the tips of the blade of a helicopter rotor in its plane of rotation. The freedom given to each blade of a rotor to allow it to move in the plane of rotation independently of other blades. This is to avoid bending stress at the root. The blade is allowed to lead or lag about a dragging hinge, but movement of the hinge is restricted by some form of drag damper to avoid undesirable oscillations.

Aviation dictionary. 2014.

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  • drag — drag …   Dictionnaire des rimes

  • Drag-On — Saltar a navegación, búsqueda Drag On Información personal Nombre real Mel Jason Smalls Nacimiento 4 de enero de 1979 (30 años) Orige …   Wikipedia Español

  • drag — queen [ dragkwin ] ou drag [ drag ] n. f. • v. 1990; empr. angl., de to drag « traîner », à cause de la robe longue, et queen « reine » ♦ Anglic. Travesti masculin vêtu de manière recherchée et exubérante. Des drag queens. ● drag nom masculin… …   Encyclopédie Universelle

  • drag — DRAG, Ă, dragi, e, adj., subst. I. adj. 1. Care este iubit, scump, nepreţuit pentru cineva, pe care cineva îl iubeşte, îl preţuieşte. ♢ loc. vb. A prinde drag (de cineva) = a se îndrăgosti (de cineva). ♢ expr. A i fi cuiva drag să... = a i plăcea …   Dicționar Român

  • drag — /drag/, v., dragged, dragging, n., adj. v.t. 1. to draw with force, effort, or difficulty; pull heavily or slowly along; haul; trail: They dragged the carpet out of the house. 2. to search with a drag, grapnel, or the like: They dragged the lake… …   Universalium

  • Drag — Drag, n. [See {Drag}, v. t., and cf. {Dray} a cart, and 1st {Dredge}.] 1. The act of dragging; anything which is dragged. [1913 Webster] 2. A net, or an apparatus, to be drawn along the bottom under water, as in fishing, searching for drowned… …   The Collaborative International Dictionary of English

  • drag — [dræg] verb [transitive] COMPUTING to move words, pictures etc across a computer screen by pulling them along with the mouse: • Either drag and drop the page into a message or choose Send Page from under the File menu. * * * Ⅰ. drag UK US /dræg/… …   Financial and business terms

  • drag — [drag] vt. dragged, dragging [ME draggen < ON draga (or OE dragan): see DRAW] 1. to pull or draw with force or effort, esp. along the ground; haul 2. a) to move (oneself) with effort b) to force into some situation, action, etc …   English World dictionary

  • Drag — Drag, v. t. [imp. & p. p. {Dragged}; p. pr. & vb. n. {Dragging}.] [OE. draggen; akin to Sw. dragga to search with a grapnel, fr. dragg grapnel, fr. draga to draw, the same word as E. draw. ? See {Draw}.] 1. To draw slowly or heavily onward; to… …   The Collaborative International Dictionary of English

  • Drag-On — Birth name Mel Jason Smalls Born January 4, 1979 (1979 01 04) (age 32) Origin Bronx, New York City United States Genres …   Wikipedia

  • Drag It Up — Studio album by Old 97 s Released July 27, 2004 …   Wikipedia

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