I have used this 352 gyro and at least for awhile it was a very hot item in europe to use on 2 axis in heading hold (switched on and off in flight). I think it was normally used in roll and yaw for locked in knife edge. I used one for awhile in a Bobcat as an expeiment, it worked fine, very robust unti with flexible prgramming. raf I have a couple NIB if you need one, good price!

Markus Zipperrer tried to explain to me how he used it inheading hold mode on roll and that somehow the roll control turned into some sort of roll rate command, I could never really understand how he did it.