Aviation dictionary. 2014.
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 coefficient — In fluid dynamics, the drag coefficient (commonly denoted as: cd, cx or cw) 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. It is used in the drag equation,… … Wikipedia
Drag (physics) — Shape and flow Form drag Skin friction 0% 100% 10% 90% … Wikipedia
Drag equation — In fluid dynamics, the drag equation is a practical formula used to calculate the force of drag experienced by an object due to movement through a fully enclosing fluid. The equation is attributed to Lord Rayleigh, who originally used L2 in place … Wikipedia
Drag count — A drag count is a single unit of drag as defined by aerospace engineers. Drag is generally computed using the equation: Where: ρ is the air density v is the current airspeed Cd is the drag coefficient (a dimensionless constant, usually on the… … Wikipedia
Drag — Contents 1 In science and technology 2 In arts, performance arts and entertainment 3 Other uses … Wikipedia
drag coefficient — i. Nondimensional coefficient equal to total drag divided by 1/2ρV2 S, where ρ is density, V is indicated air speed, and S is surface area of the body. ii. A coefficient representing the drag on a given airfoil or other body or a coefficient… … Aviation dictionary
drag coefficient — (Cd) A number used in calculating the aerodynamic drag acting on a vehicle. The drag coefficient is a function of factors like the shape of the vehicle, airflow through the vehicle for ventilation and cooling. The number is determined in a wind… … Dictionary of automotive terms
drag coefficient — noun the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body • Syn: ↑coefficient of drag • Hypernyms: ↑coefficient * * * noun : a factor representing the ratio of the aerodynamic drag… … Useful english dictionary
drag curve — A curve of a drag coefficient plotted against either the lift coefficient or the angle of attack. Graph drawn for coefficient of lift against coefficient of drag. Relationship between drag coefficient and angle of attack … Aviation dictionary
Drag divergence Mach number — The drag divergence Mach number (not to be confused with critical Mach number) is the Mach number at which the aerodynamic drag on an airfoil or airframe begins to increase rapidly as the Mach number continues to increase[1]. This increase can… … Wikipedia
