La ubicación de la fuerza de arrastre

Exact formula for the drag force location

D F_{l o c} = \sum_{i = 0}^{n} \frac{P_{i} \cdot A_{i}}{\sum_{i = 0}^{n} A_{i}}

A_i	Area of the i-th triangle
P_i	Center of the i-th triangle

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