Hi there, i am a helicopter engineer currently doing a degree in aircraft maintenance and the the essay i`m doing at present is on autopilots and asks me to explain how it has developed from the autostabiliser system through to the modern AFCS. I`ve got plenty of info on afcs but am struggling with finding history. I got a monster reading list from the uni and was looking for a bit of assistance to narrow it down before buying books that are useless. any help would be greatly appreciated.