Tumleren-class torpedo boat
The "Tumleren" class was a class of three torpedo boats built for the Royal Danish Navy. The lead ship of the class, was designed and built by the German shipyard Schichau-Werke in 1911, with two more ships, and , built under license by the Copenhagen naval dockyard. The last of the three torpedo boats was retired from active service in 1930, and the three ships were sold for scrap in 1935. Construction and design. In 1908, the Royal Danish Navy decided to acquire several torpedo boats, with two of the world's leading torpedo boat specialists , the German shipyard Schichau-Werke and the British shipyard Yarrows, each contracted to design and build a prototype torpedo boat, with two more torpedo boats of each design to be built under license in Danish shipyards. Schichau's design, the "Tumleren" class, were long overall and length between perpendiculars, with a beam of and a draught of fully loaded. Displacement was full load. Two coal-fed boilers supplied steam for two Schichau direct-drive steam turbines, which drove two propeller shafts. The machinery was rated at , giving a design speed of . of coal was carried, giving a cruising radius of  at . The ships carried five torpedo tubes, with one in the bow and the remaining four in single swivelling mounts fore and aft on the ships' beam. Two 75 mm L/30 guns were carried fore and aft on the ships' centreline, with a single machine gun completing the armament. Crew was 35 officers and other ranks. The first of the ships, the Schichau-built was launched at Schichau's Elbing, Prussia (now Elbląg, Poland) shipyard on 1 March 1911 and commissioned on 28 August that year, while the remaining two ships, and , were built at the Orlogsværftet, the Copenhagen Naval  Dockyard, launching later that year and completing in 1912. Service. The three "Tumleren"-class ships were considered more advanced than the Yarrow designed s, although the "Söridderen" class, which had higher freeboard, were more seaworthy. They served through the First World War on neutrality patrols. "Tumleren" and "Spækhuggeren" were retired to the reserves in 1929, with "Vindhunden" following in 1930. All three ships were sold for scrap in 1935.