An almost maintenance-free plain bearing with low coefficients of friction combined with aluminium F52 is designed to adjust the blades on a highly efficient propeller with a folding mechanism. The smooth-running and vibration dampening properties of iglidur® J were able to impress here. Furthermore, a search was made for a robust, cost-effective and maintenance-free solution for the rotary movement of the steering wheel. DryLin® R solid polymer bearings provide the ideal solution here, as besides meeting the required properties they are also resistant to temperature.