Originally Posted by
FCeng84
Yaw dampers are an example of early augmentation wherein the rudder command is the sum of the pilot command via the rudder pedals and the control system yaw damper command.
Absolutely correct. In fact it goes back even earlier to pure electro-mechanical devices such as the aileron/elevator boost in the '50s-era propliners. Congrats on a succinct, concise and informative post, that I may well squirrel away for later use myself!
mross - I hate to say it, but you're well off-base here.