Couple of years ago I got to have a fly around the Hartford area in the Huskie that Kaman have their for their Kmax pilot training and was shown the attributes of the servo flap.
Was actually pretty cool. Could smooth the thing out amazingly well while in flight and was also shown how rough it could become when it was placed out of whack.
The guys logging with the Kmaxs have said that the servo flap allows them to basically retrim the aircraft if and when they like without having to go back into the hangar and have an engineer look at it.
