Rotor with variable hydrodynamic resistance for a stationary water bicycle and related bicycle
System for protecting a rotatable shaft of a motor from excessive bending moments
System for protecting a rotatable shaft of a motor from excessive bending moments
System For Protecting a Rotatable Shaft of a Motor from Excessive Bending Moments
System For Protecting a Rotatable Shaft of a Motor from Excessive Bending Moments
Rekuperativer Propellerantrieb mit gegenläufiger Turbine.