Hartzell Propeller Company Hartzite, the first composite propeller blades. In 1945 Hartzell developed the world’s first composite propeller blade using a fabric-based plastic material, which was dubbed Hartzite. Hartzite is weather proof through and through, minor damages were not serious. Hartzite, a proprietary composite material, had the highest fatigue strength-weight ratio and the highest vibration-damping qualities of any propeller developed in this time. » read more
