impeller
noun: the blade of a rotor (as in the compressor of a jet engine)
Schauberger
The pressure turbine
On the 16th of May 1913 Prof. Dr. Viktor Kaplan was able to inform the world's leading turbine manufacturers that he had succeeded in achieving rotational velocities and efficiencies with his newly designed impeller, which far exceeded existing norms. [The Energy Evolution - Harnessing Free Energy from Nature, Cadaverine Poison in Ray-Form - Ptomaine Radiation]