# coefficient of drag (CD)/drag coefficient

- coefficient of drag (CD)/drag coefficient
A coefficient dependent upon the angle of attack, shape of the airfoil, Reynolds number, and Mach number. Drag coefficient (*C*_{D }) = Drag (*D*)/Dynamic Pressure (*q*) or {^{1 }/_{2 }(Density (ρ) × Air Speed^{2 } (*V*^{2 }) × Wing Area (*S*). *C*_{D } = *D/qS*, or 2*D*/ρ*V*^{2 }*S*.

*Aviation dictionary.
2014.*

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**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

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**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

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**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