No. 10183. L.F.G. Roland D.IV German Army Air Service
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L.F.G. Roland D.IV

11/30/2010. The D.IV single-seat fighter triplane of mid-1917 marked a noteworthy departure from previous L.F.G. (Luft-Fahrzeuggesellschaft) structural methods in that the Wickelrumpf (wrapped fuselage) that had characterized all previous aircraft gave place to the so-called Klinkerrumpf clinker-built or lap strake construction utilizing the planking methods commonly employed in the construction of small boat hulls. Strips of spruce overlapped one another by some two-thirds over a light framework of stringers and formers. This method of construction was less time-consuming than the Wickel-rumpf and comparably robust.

The D.IV later to be re-designated Dr.I when the "Dr" prefix was adopted for Dreideckers (triplanes) was powered by an 160 hp Mercedes D III water-cooled engine and carried the usual armament of twin synchronized 0.311 in (7.9 mm) LMG 08/15 machineguns. A single prototype was ordered by the Idflieg for evaluation, but this crashed at the end of September 1917. It was promptly rebuilt utilizing a D.VI fuselage, but subsequent testing revealed no particularly outstanding characteristics and further development was discontinued.

Created November 30, 2010