allthatglitters
The BAC 1-11 had an APU supplying electrical power & aircon only. I do not recall the 1-11 having manual reversion at all. The ailerons were manually 'flown' by a cable operated tab (no hydraulics at all) and the rudder & elevators were hydraulic powered. Emergency elevator was powered by a DC operated trim tab. There was no emergency control over the rudder. Emergency flaps could be selected by a DC pump (down selection only). If the APU could supply AC power, then hydraulics was not a problem as there were two AC hydraulic pumps, one for each system, assuming each system was intact!
But I stand ready to be corrected.
CC