Originally Posted by
212man
In simple terms, think of 3-axis as FW without A/T, and 4-axis as with it. There's more to it than that, but in 3-axis a helicopter is potentially as vulnerable as the situations you describe (and Turkish Airlines, Thomas Cook etc)
Well
some helicopters, yes definitely, although as we have mentioned, not all.
Jwscud, out of interest do some modern fixed wing have flight envelope protection whereby autothrottle is automatically engaged if airspeed is reducing too much, for example due to too high a pitch attitude or vertical speed demand for the power set?