The invention relates to {HEAD ~ large surface area structural components} such as {TAIL ~ an aircraft doors}, aircraft body sections having an outer skin reinforced by stiffening elements 
such as
The invention relates to { HEAD ~ large surface area structural components } such as { TAIL ~ an aircraft doors } , aircraft body sections having an outer skin reinforced by stiffening elements
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH