The invention relates to a rotor for a wind turbine of the type having a rotor hub and a set of rotor blades. The circuit includes a hydraulic ram that moves the load arm and a first hydraulic accumulator connected to a first chamber of a hydraulic ram. The etch buffer layer includes an overhang component disposed on the upper portion of the sidewall spacers with an edge that extends laterally. Small quantities of oxidant may be deliberately introduced into the fuel delivery conduit to generate water vapor and heat to pre-condition the fuel delivered to the anode.