Chris Scott re your post 544
I also have only a civil background and therefore heve never flown AoA in normal operations. However, I used to fly as co-pilot or observer on many VC10 C of A air tests. As I remember, the aircraft was prepared by having a cabin window removed and replaced with a blanking plate on which a vane was fixed. This in turn was connected to an AoA indicator which was mounted in the centre on top of the glare shield. During stall tests to stick push it was always someone's sole responsibility to monitor the AoA indicator and shout if the push had not occured before 15 deg AoA. At which point both pilots pushed like hell!
May I congratulate the various contributors to this thread on some really excellent posts. Thank you!