Member formed of fiber-reinforced plastic material, such as a rotor blade

US4255087A · kind A · utility

Assignee

• Messerschmitt Bolkow Blohm GmbH · DE

Inventors

• Peter Wackerle · Ottobrunn, DE
• Klaus Brunsch · Feldkirchen-Westerham, DE
• Josef Grober · Munich, DE

Key dates

• Filing date: Jun 5, 1979
• Grant date: Mar 10, 1981
• Expiry date: Jun 5, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C27/46
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A rotor blade formed of a fiber-reinforced plastic material is constructed for the absorption of at least one of longitudinal forces and bending forces. The interior of the blade is formed of an elongated bundle of fiber strands forming a loop intermediate its ends. The loop defines one end of the longitudinally extending blade. The bundle has two limb portions extending from the loop and forming, adjacent the loop, a transition portion followed by a neck portion and then a blade portion. A skin encloses the blade outwardly from the loop. A layer of fiber strands extends around the outer surface of the loop and between the skin and the limb portions at least in the transition portion. In the region of the loop the fiber strands extend in parallel relation with the fiber strands in the bundle, however, in the transition portion the fiber strands in the layer extend angularly across the longitudinal axis of the blade.