Aircraft with supporting wings having members for taking up tensile and compressive forces

US5924649A · kind A · utility

Assignee

• Deutsche Forschungsanstalt Fur Luft-Und Raumfahrt E.V. · DE

Inventors

• Matthias Piening · Braunschweig, DE
• Arno Pabsch · Braunschweig, DE
• Christof Sigle · Braunschweig, DE

Key dates

• Filing date: Aug 9, 1996
• Grant date: Jul 20, 1999
• Expiry date: Aug 9, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C1/26
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An aircraft with supporting wings including wing shells with good shear strength made of fibrous composite materials, particularly fiber-reinforced plastics, having members taking up tensile and compressive forces on the inside of the wing shells. The members have unidirectional fibers extending longitudinally of the wing, and fixing elements which can be joined detachably to fuselage attachments are provided on the members at the root end of the wing. Stringers are constructed on the inside of the wing shells and spaced longitudinally of the shells, their fiber component being formed by a fiber layer joined to the fiber layer of the wing shell. Fiber bundles are arranged between spaced stringers as unidirectional stiffening elements. The fiber bundles are embedded in the synthetic resin matrix of the plane load-bearing structure and extend longitudinally of the supporting wing. Groups of three fiber bundles extending adjacent each other are provided, of which the two outer bundles in each case form a loop at the root of the supporting wing to receive a bolt which has to be inserted in the loop perpendicular to the plane of the two fiber bundles. The inner bundle is turned down to …