Originally Posted by Clandestino
...How is Kingair protected from low pitch in flight?
There is a squat switch that contols the beta valve positioning between flight idle and ground idle. Now, you can override that in flight by lifting the power levers into the beta range which, as you can imagine, would be a bad idea and probably ruin your day.
Once on the ground, the props automatically go to the finer pitch setting of ground idle. I guess you could say it works like a poor man's spoilers in a way because of the sudden increase in aerodynamic drag caused by the flatter pitch.