Wind structure for models with log(L_*/L_⊙) = 4.5, M_* = 15 M_⊙, and T_eff = 15 000 K. The upper panels show Γ and the other terms in the eom throughout the wind. The lower panels show the ionisation fractions for FeIII and FeIV. The upper-left and lower-left panels are the results for the self-consistent models (with Ṁ = 2.64 × 10⁻¹⁰ M_⊙ yr⁻¹ and = 3028 km s⁻¹), while the upper-right and lower-right panels are the results using a β-velocity law of β = 1.0 (with Ṁ = 4.67 × 10⁻⁸ M_⊙ yr⁻¹ and v_∞ = 588 km s⁻¹). The abscissae show a radius coordinate (lower) and the velocity (upper).