So, if drum speed cuts fuel and ignition, how would drum speed ever exceed its programmed limit?
Even if the sprag is in a failed state, the drum would go 2.45 x engine rpm. But engine rpm is not the fuel/ignition cut determing switch, drum speed is.
Lets say I set max drum speed at 8000 rpm, if the sprag was in a failed state, engine rpm would only get to a little over 3,265 rpm before fuel/ ignition cut. A bit of inertia wouldn’t let it exceed the rpm limit, it would only prolong its deceleration.