Factor C3 pipe

Symbol
$C_{g3}$
Formulas
$\frac{2}{\beta_b \left(\pi-\beta_b\right)} \frac{C_{g1}}{\sqrt{{C_{g2}}^2-1}}$Morud & Simonsen $C_{g2}$ > 1
$\frac{1}{\beta_b} \left(\pi-\beta_b\right) \frac{C_{g1}}{\sqrt{1-{C_{g2}}^2}}$Morud & Simonsen $C_{g2}$ ≤ 1