What phase follows post-stall gyrations in a spin if pro-spin controls are maintained?

After post-stall gyrations, if pro-spin controls are maintained, the aircraft will enter the incipient spin phase. This phase indicates that the aircraft has transitioned from the post-stall gyrations, where it is experiencing initial disturbances in its attitude due to a stall, to begin a more defined and stable position in the spin.

During the incipient spin, the aircraft starts to develop a rotational motion around its vertical axis, and the yaw and pitch attitudes of the aircraft will begin to stabilize. Maintaining pro-spin controls ensures that the spin tendency is reinforced rather than negated, allowing the aircraft to fully enter this phase.

The subsequent phases, such as a steady state spin, require that the incipient spin develops further. A recovery phase would only occur if the pro-spin controls were modified or if recovery actions were taken to exit the spin. Uncontrolled descent implies a lack of controlled flight; however, that is not the immediate outcome of maintaining the pro-spin settings. Instead, staying in the incipient phase indicates a clear progression towards a fully developed spin state.