Thielerts rely heavily on electricity for the Fadec.
That was the point I was trying (obviously badly) to make. The old diesels didn't need a FADEC but were heavy.
Thielert must have started from the position of "how can we make an aero diesel quickly and solve all the problems?" Answer - use a car engine. But that's where all the problems have been, from using the car engine and converting it.
But look where all the others trying to make aero-diesels are........ nowhere.