Here's what I know about Rotorways + why I stay away from them - their tail rotor is powered by a series of linked rubber drive belts - same kind as turns the fan behind the radiator in your auto!! Can't say for sure what system Robinson uses, but for my money a series of rubber v-belts linked by a series of pulleys is a REALLY low-cost and possibly dangerous) solution to the power transmission problem.
- hover lover