Tried and failed a few times to get a RAAF Gooney Bird off on one. This was after having established that the equivalent of a feathered prop when airborne was roughly 15 inches of boost at 2000 rpm.
Started each attempt with one idling as above and almost down wind. Some reasonable wind was mandatory. Full rudder then allowed for a slow increase in power on the 'live' engine whilst allowing a gradual turn into wind. All of this on the grass. Failures followed as one commenced to sense that a wind speed of over 30 kts was essential.
Finally made it airborne with about 35 Kts of wind much to the relief of Bil Simmonds in the right seat and the SATCO.
Then there was the time I started a take off in a Beverley with an outer electric prop in reverse due to a broken slip ring brush housing.. Didn't take long to abort.
Windmill taxi starts of an engine on early model Hercules C-130s were an interesting challenge.