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In aerodynamics, the lift-to-drag ratio (or L/D ratio) is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air. It describes the aerodynamic efficiency under given flight conditions. The L/D ratio for any given body will vary according to these flight conditions.
During wind tunnel testing at Imperial College, Frank Dernie recorded that the FW08 had a lift to drag ratio of a remarkable 8:1 - eight parts downforce to just one part drag, giving the FW08 supreme aerodynamic efficiency and giving Keke Rosberg a chance to compete with the far more powerful turbo Renault and Ferrari during the 1982 season ...
Aero Warriors, also called aero-cars, is a nickname for four muscle cars developed specifically to race on the NASCAR circuit by Dodge, Plymouth, Ford and Mercury for the 1969 and 1970 racing seasons. [1] The cars were based on production stock cars but had additional aerodynamic features. The first Aero Warrior was the 1969 Ford Torino Talladega.
The term drag area derives from aerodynamics, where it is the product of some reference area (such as cross-sectional area, total surface area, or similar) and the drag coefficient. In 2003, Car and Driver magazine adopted this metric as a more intuitive way to compare the aerodynamic efficiency of various automobiles.
For the 1989 24 Hours of Le Mans, the French manufacturer fielded two cars: a P87 chassis and a P88 chassis; both equipped with minor technical updates and therefore renamed them the P489, recognizable on the outside by a different rear wing. The main objective of the team was not to reach new top speed records, aiming instead to finish the ...
His 1961 car attempted to use the shaped underside method but there were too many other aerodynamic problems with the car for it to work properly. His 1966 cars used a dramatic high wing for their downforce. His Chaparral 2J "sucker car" of 1970 was revolutionary.
Aerodynamic aids can then be used to provide the necessary balance and stability characteristics at higher speeds. [3] Spoilers and wings on a vehicle have little effect at low speeds as improper designs may create undesirable responses and lower stability or efficiency for the car at high speeds. [3]
For conventional fixed-wing aircraft with moderate aspect ratio and sweep, Oswald efficiency number with wing flaps retracted is typically between 0.7 and 0.85. At supersonic speeds, Oswald efficiency number decreases substantially. For example, at Mach 1.2 Oswald efficiency number is likely to be between 0.3 and 0.5. [1]
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