Simple economical drive train; (for model or UAV?)
Sketch:
Notes:
The control rods of spider or swashplate control system could be located inside the crown.
Possible concern: Because there are three different tensions on the three 'runs" of the V-belt, there is the possibility of a continual small differential in the speeds of the two sheaves on the pinion shafts. The 'creep of the friction drive V-belt and the non-creep of the cog-belt may create a growing and opposing tension between the two belts. This in turn, may result in tensions that exceed the limits of one of the belts.
