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Why did the Fokker DVII have no lightening holes in the rib webs
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The Fokker D.VII prototype still had lightening holes in the ribs. Why was this not adopted for series production? • The Fokker triplane was the first Fokker production aircraft to have a thick wing cross-section. After the introduction of the triplane, it became apparent that condensation inside the wing could also penetrate the relatively thin rib webs and contribute to the loosening of the plywood. This was followed by an extensive investigation into the cause of the accident involving the two aircraft Fok. Dr.I 115/17 and 121/17. The inspectorate of the German Army Air Service then issued a demand that no lightening holes should be made in such rib webs. Since the D.VII was based on the experience of the Dr.I, it and all other Fokker aircraft were manufactured by Fokker without lightening holes.The use of initially 1.2 mm and later 1 mm thick plywood compensated for the weight disadvantage. • All documents relating to these processes can be found in the museum's archive and will gradually be made available to all interested parties on our Patreon page. / museumfuerflugzeugbau • Subscribe to our channel if you are interested in German aircraft technology up to 1920. • Follow us on Facebook as we build the airplanes: / 2145618568814194 • And take the virtual tour of our museum: www.fokker-museum.de • Our article on the wing failures of the triplane in October 1917: / mftg-fokker-dr-i-crashes-471977 • TwitterX: @achi28942
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