Canted spar with intermediate intercostal stiffeners
US4162777A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 1978 |
| Grant date | Jul 31, 1979 |
| Priority date | — |
| Expiry date | May 2, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C3/26
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An aircraft wing box construction including canted sheet metal spar webs continuously tied to the upper and lower skins. Sheet metal intercostal stiffeners of substantially triangular configuration are spaced spanwise along the web to provide shear stiffening for the web and intermittent stabilization for the upper skin. Both the shear web and intercostal stiffeners are fastened to spanwise continuous spar caps which are attached to the upper and lower skins. These caps, supported by the intercostals and webs, provide sufficient stabilization to prevent upper skin buckling up to ultimate design stress with a minimum of shear webs thereby providing significant weight savings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.