profile drag coefficient

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• Very-low-drag bullet — Very low drag bullets (VLD) are primarily a small arms ballistics development of the 1980s–1990s, driven by shooters desire for bullets that will give a higher degree of accuracy and kinetic efficiency, especially at extended ranges. To achieve… …   Wikipedia

• Lift-to-drag ratio — In aerodynamics, the lift to drag ratio, or L/D ratio ( ell over dee in the US, ell dee in the UK), is the amount of lift generated by a wing or vehicle, divided by the drag it creates by moving through the air. A higher or more favorable L/D… …   Wikipedia

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• Oswald efficiency number — The Oswald efficiency, similar to the span efficiency, is a correction factor that represents the change in drag with lift of a three dimensional wing or airplane, as compared with an ideal wing having the same aspect ratio and an elliptical lift …   Wikipedia

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