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Leading Edge Structure with integral airbag

IP.com Disclosure Number: IPCOM000249982D
Publication Date: 2017-May-12
Document File: 3 page(s) / 526K

Publishing Venue

The IP.com Prior Art Database

Abstract

The idea is targeted to any leading edge (LE) structure of an aircraft which has to withstand high impact energy, but in particular for the vertical tail plane (VTP), or wing.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 60% of the total text.

Title: Leading Edge Structure with integral airbag

Page 1 of 3

1. TECHNICAL AREA

The idea is targeted to any leading edge (LE) structure of an aircraft which has to withstand high impact energy, but in particular for the vertical tail plane (VTP), or wing. 2. PRIOR ART

Several solutions for metallic leading edge structures are well-known. For example

- Bruhn E.F. “Analysis and design of flight vehicle structures”, 1973, Jacobs & Ass., Inc., Indianapolis.

- Niu MCY “Composite airframe structures”, Conmilit Press Ltd, 1992. Normally a span-wise section (there may be several such span-wise sections) of the composite LE is a sandwich structure made of GFRP laminate and core.

One of the more critical load cases for the LE is a bird strike load case occurring during take-off or landing. The LE, having proper aerodynamic shape, must protect the VTP front spar from possible damages due to the strike.

Title: Leading Edge Structure with integral airbag

Page 2 of 3

3. OBJECT AND SUMMARY OF IDEA

The object of this idea is to provide a LE composite structure with improved impact energy absorption properties. The proposed solution allows weight saving of the GFRP/sandwich structure up to 10%. The idea is to have a so-called “Integral Airbag” or several of such bags span-wise between the conventional LE structure and the spar filling the empty volume. The sketches illustrating the idea are enclosed below. The Airbag should be made of a thin airtight material like rubber and maybe reinforce...