How does the power get from the engine to the rotors?
The power is transferred from the engine using a main gearbox which changes the power from the engine and sends it to the transmission. In the transmission RPM is reduced from thousands of RPM to hundreds of RPM. By doing this the torque is increased and the rotation is slowed to an acceptable level for the rotor system. The transmission drives the mast which gives direct rotation to the rotors. Often another shaft will come out of the transmission to directly drive the tailrotor as well. An accessory gearbox mounted on the engine draws little engine power to drive things like the oil pump, the generator and the fuel control for the engine itself. Runways; they are not just for breakfast anymore.
