The Boeing Company
Co-cured spar and stringer center wing box

Abstract:

A center wing box assembly for an aircraft which includes: a composite lower wing skin, a composite upper wing skin and a composite spar which extends between the composite lower wing skin and the composite upper wing skin. The center wingbox assembly further includes a composite stringer which extends along a web of the composite spar in a wing span direction. The composite spar has a co-cure securement with the composite lower wing skin and with the composite upper wing skin and the composite stringer has a co-cure securement with the web of the composite spar.