The Zeppelin D.I, or Zeppelin-Lindau D.I or Zeppelin D.I (Do), as named in German documents, also sometimes referred to postwar as the Dornier D.I or Dornier-Zeppelin D.I, for the designer, was a single-seat all-metal stressed skin monocoque cantilever-wing biplane fighter, developed by Claude Dornier while working for Luftschiffbau Zeppelin at their Lindau facility. It was too late to see operational service with the German Air Force (Luftstreitkräfte) during World War I.
Zeppelin-Lindau D.I
Zeppelin-Lindau (Dornier) D.I on trestle
In mechanical engineering, stressed skin is a rigid construction in which the skin or covering takes a portion of the structural load, intermediate between monocoque, in which the skin assumes all or most of the load, and a rigid frame, which has a non-loaded covering. Typically, the main frame has a rectangular structure and is triangulated by the covering; a stressed skin structure has localized compression-taking elements and distributed tension-taking elements (skin).
The Zeppelin-Lindau D.I had stressed skin fuselage and wings.
Internals of stressed skin construction on Murphy Moose showing frames and supporting skin
Section from the original Britannia Bridge, showing top and bottom stressed-skin construction
Worker carrying partially finished Deperdussin Monocoque fuselage, c. 1912