W.Green, G.Swanborough The Complete Book of Fighters
SODERTELGE SW 15 Sweden
Designed by V Forssman and owing much to the Siemens-Schuckert D Ia - the drawings of which had been supplied by the German company to Baron Carl Cederstrom, the first Swedish aviator and manager of the Sodertelge Verkstader - the SW 15 was built in 1917. A single-seat fighting scout powered by a Vabis-built Benz Bz II six-cylinder water-cooled engine rated at 110 hp, the SW 15 was primarily of wooden construction with steel-tube wing spars and fabric skinning. An unequal-span single-bay staggered biplane, the prototype crashed on 17 June 1917, ground looping and killing its pilot, Bertil de Mare. The SW 15 was repaired and fitted with two 8-mm Schwarzlose m/14 machine guns with synchronization gear developed by Capt G von Porat and Ing Kolthoff. As a result of further flight testing, two more SW 15s were built for Flygvasendet, but these enjoyed strictly limited success, one flying 19 times and the other four times, both being finally grounded in December 1921.
Max speed, 78 mph (125 km/h) at sea level.
Span, 27 ft 1 1/4 in (8,26 m).
Length, 19 ft 4 1/4 in (5,90 m).
Height, 8 ft 2 1/3 in (2,50 m).