Reversible pump turbines
Reversible pump-turbine
Reversible pump-turbine
Revolutionary engine
Ribbon drive power generation apparatus and method
Rigitano wind mill ii
Rimmed turbine
Rising energy
Rising energy
River ocean turbine
River turbine
Road energy recycler
Road vehicle actuated energy device
Roliq motor
Roof mounted wind turbine
Root-end of a wind turbine blade
Rotary device driven by a moving fluid
Rotary diesel engine, supercharger, steam and gas turbine
Rotary float engines
Rotary fluid pressure device with modular multi-speed...