The composite propeller is one of the most important parts of the FES system.
This particular propeller blades shape is suitable for Diana 2 FES type of powered sailplane.
The propeller blades are made of CFK (Carbon Fiber Composite) in metal molds, which are CNC machined. This manufacturing technique assures high geometrical accuracy of the molds which enables us to manufacture propeller blades with the best geometry tolerance currently possible.
A high quality acrylic white paint is used to protect the solid composite body against the moisture and erosion. The paint is resistant to fuel, oil, and other chemical products and has excellent flexibility.
Each pair of propeller blades is sanded and polished to reduce the mass difference between them to less than 0,3 g.