Propeller has one or multiple propeller blades arranged on propeller hub and each propeller blade is prestressed radially inwards by spring unit

摘要

The propeller has one or multiple propeller blades (4,6) arranged on a propeller hub. Each propeller blade is arranged in a radially movable manner. The propeller blade foot extends through an opening (16,20), which closely surrounds the blade foot of a hub housing surrounding the propeller hub. Each propeller blade is prestressed radially inwards by a spring unit.