drag coefficient

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drag coefficient

[′drag ‚kō·i′fish·ənt]
(fluid mechanics)
A characteristic of a body in a flowing inviscous fluid, equal to the ratio of twice the force on the body in the direction of flow to the product of the density of the fluid, the square of the flow velocity, and the effective cross-sectional area of the body.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

drag coefficient

drag coefficient
A typical drag coefficient curve of an airfoil.
i. Nondimensional coefficient equal to total drag divided by ¼ ρ V2S, 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 representing a particular element of drag.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
That applies to the Coupe too, which is surprising given the dramatic rake of the roof - a feature which makes it highly aerodynamic, with a drag co-efficient which is identical to that of a Porsche 911 Carrera.
The concept car has a glass roof with electronic sun blinds, and a super slippery body shape with a drag co-efficient of just 0.26Cd.
In this league, not only has the Audi the lowest drag co-efficient of the four, which certainly makes it the most pleasant to drive, it also feels much stronger.
The new bodyshell has a drag co-efficient of 0.342, making it more aerodynamically efficient than the Audi TT (0.353).
Aerodynamics are also superior: the drag co-efficient drops from 0.29 to just 0.26.
The monocoque body construction of the EcoSport achieves an impressive drag co-efficient of 0.371.
It still looks good and bang up to date for 2006 and its body shape is, of course, aerodynamically efficient with a 0.32 drag co-efficient. This is achieved with very tight body shut lines, flush fitting windows and headlights, cleverly designed door mirrors and efficient under-body panels.
Insiders are claiming a drag co-efficient of 0.3, 300-plus bhp from a tuned 3.2-litre V6 and a top tilt around 180 mph, with 60 coming up on the dial in a smudge over four seconds.
The entirely new bodyshell has a drag co-efficient of 0.342, making it more aerodynamically efficient than the Audi TT (0.353) and the Ford Cougar (0.345).
Anything with that kind of a coupe-like look has to be good in terms of the aerodynamic drag co-efficient and my thinking is borne by the figures - the XF has a drag coefficient of just 0.29 which is good with respect to wind noise, fuel consumption and high speed s stability.
For instance more precise body stamping accuracy has been achieved and this combines with smoother bodywork and underfloor profiling plus flush glazing to achieve a drag co-efficient of 0.25.
The suspension has also been lowered by Skoda engineers and stiffened to provide a very low drag co-efficient.