def CL(self, alpha):
    CL0 = MAV.C_L_0
    CLA = MAV.C_L_alpha
    sigma_alpha = self.sigma(alpha)
    CL_alpha = (((1 - sigma_alpha) * (CL0 + (CLA * alpha))) + (sigma_alpha * (((2 * np.sign(alpha)) * (np.sin(alpha) ** 2)) * np.cos(alpha))))
    return CL_alpha
def CL(self, alpha):
    CL0 = MAV.C_L_0
    CLA = MAV.C_L_alpha
    sigma_alpha = self.sigma(alpha)
    CL_alpha = (((1 - sigma_alpha) * (CL0 + (CLA * alpha))) + (sigma_alpha * (((2 * np.sign(alpha)) * (np.sin(alpha) ** 2)) * np.cos(alpha))))
    return CL_alpha