Help!.
I have a new Robbe Ornith with a Magnum 46 XLS. The engine is in the heli, and the heli is tied to the workbench. I cannot seem to get the mixture right. It is fairly goog from idle up to mid throttle, but when I go to about 60% throttle, the engine gradually picks up speed, goes out of control, then cuts out. The mixture seems to be quite rich as there is lots of smoke, but it seems to behave like it is too lean and is over-heating

Any advice would be appreciated......