On the subject of engine failures in S/E aircraft the Z-242L AFM states:
The maximum gliding distance is obtained at CAT. A,U: 73 knots (135 km/h)
and one of the engine failure actions:
Control the aircraft - MAINTAIN 78 knots MIN.
Stall speed is 60 knots clean so would someone be able to tell me why the drills don't involve trimming for best-glide and why the 78kt mimimum?