spar flange

The ducts were located just forward of the front spar flanges and in between the main spars where they could escape into the wing.

Oeffag engineers noted the wing failures of the D.III and modified the lower wing to use thicker ribs and spar flanges.

Glue the wing joiner tubes in place, allowing for the thickness of the plywood root rib, and block around them with scrap wood to fill the space between the spar flanges.

The wing shells are a carbon fiber/foam core sandwich construction with one main spar constructed of a glass fiber/foam core shear web and carbon fiber spar flanges.