Second component of inductance due to second layer armour steel wires.
For steel tape armour, the length of lay $p_{a_2}$ is assumed to be equal to the mean diameter of the second armour layer $d_{a_2}$.

Symbol
$H_{\mathrm{2_{\mathrm{2}}}}$
Unit
H/m
Formulae
$\frac{1.0 \cdot 10^{-7} \mu_{\mathrm{e}}}{d_{\mathrm{a_{\mathrm{2}}}} p_{\mathrm{a_{\mathrm{2}}}}} d_{\mathrm{f_{\mathrm{2}}}}^{2} n_{\mathrm{a_{\mathrm{2}}}} \pi \sin{\left (\beta_{\mathrm{a_{\mathrm{2}}}} \right )} \sin{\left (\gamma_{\mathrm{a}} \right )}$
Related
$\beta_{\mathrm{a_{\mathrm{2}}}}$
$d_{\mathrm{a_{\mathrm{2}}}}$
$d_{\mathrm{f_{\mathrm{2}}}}$
$\gamma_{\mathrm{a}}$
$H_{\mathrm{2}}$
$\mu_{\mathrm{e}}$
$n_{\mathrm{a_{\mathrm{2}}}}$
$p_{\mathrm{a_{\mathrm{2}}}}$
Used in
$B_{\mathrm{2_{\mathrm{2}}}}$