Ratio of losses affecting 1st armour bedding

Ratio of losses in conductor, screen/sheath and armour 1 to losses in conductor.

Symbol
$q_{2_{1}}$
Formulae
$\lambda_{1} + \lambda_{2} + 1$only one armour layer
$\frac{R_{A_{1}} \lambda_{2}}{R_{A_{1}} + R_{A_{2}}} + \lambda_{1} + 1$two armour layers