What happens to the starter after engine start?

After the engine starts, the starter is designed to transition into a generator function. In the context of the T-6 aircraft and many similar systems, once the engine reaches a certain speed and is successfully running, the starter disengages from the engine. At this point, the electrical system takes over, and the starter motor is no longer needed for propulsion. Instead, the behavior of the starter shifts, allowing it to function as a generator. This is crucial because it helps supply electrical power to the aircraft's systems and recharge the battery.

The other options do not accurately reflect what occurs with the starter after the engine starts. Although the starter may become inactive in other contexts, in this case, it does not simply remain inactive as the power generation role becomes essential for continued operations. Furthermore, it does not continue to ignite fuel or operate in a way that would keep engaging the combustion process, nor does it automatically shut down in a way that removes its function entirely. The correct understanding of this transition highlights the versatility and dual-use nature of the starter system in support of the aircraft's operational needs.