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The wind force

The wind force

For a bullet, moving at velocity v, having a yaw angle d, the flowfield pressure differences result in a net force which is called the wind force F1. This force seems to apply at the centre of pressure CPW of the wind force, which, for spin-stabilized bullets, is located in front of the centre of gravity CG. The location of the CPW depends on the flowfield conditions and varies as the velocity decreases. Two forces FW and F2, applying at the CG, which mutually neutralize, can be added to the wind force (see next figureGo to figure).

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