At what point does the D-180 "Hobbs" begin to 'count' engine hours? Is it immediately upon startup, or at some specific airspeed, or perhaps oil pressure?
From the FlightDEK-D180 Pilot's User Guide, Rev H, page 4-12:
The Hobbs Timer records the duration of time engine oil pressure is at 15 PSI or higher.
At what point does the D-180 "Hobbs" begin to 'count' engine hours? Is it immediately upon startup, or at some specific airspeed, or perhaps oil pressure?
