Hawker 700 stall characteristics
From the aforementioned article:
"While conducting the wing-maintenance stall check in November 2000 in a Hawker 700, he wrote, “I needed six flights to correct the flick [roll at the stall]. An engineer came with us on the second flight to witness the violent flick. He came again when it was nearly fixed to see the improvement. It seems strange to me that [the Lincoln Hawker] stalled so far above the expected stall speed [20 knots]. There must have been something else that caused the roll. I have never used the autopilot and, whatever type of aircraft, have always aimed for a decrease of one knot per second.”