I cut engine one to see what would happen. You can still fly the L1011, but it's not easy, and you have to compensate for the yaw and hold altitude and speed... I'm not sure I would trust the autopilot do do this or want to finish a flight. (Not sure I'd want to land, either!) The better news is it's easy to relight the engine. I just switched it back on, and used the conveniently located "windmill air start" button on the overhead right below the ground start buttons. I was actually kind of impressed at the results. The passengers, not so much. Fun times for an airplane that isn't a "study level sim" (as I keep being told) where failures are a feature.