O.Thetford, P.Gray German Aircraft of the First World War (Putnam)
Siemens-Schuckert D VI
Last of the S.S.W. fighters, the D VI parasol was due to replace the D IV on the production line, but only two machines (3054 and 3055/17) were completed. The strut-braced wing carried overhung balanced ailerons and, peculiarly, increased in depth of section from centre-section outwards to about mid span of each panel, then decreased in depth again towards the tips. A jettisonable fuel tank underneath the fuselage was a unique feature of this aeroplane. Flight trials were carried out from February to May 1919, during which period one machine was destroyed, but not before very encouraging climb and speed figures had been achieved. Engine, 160 h.p. Siemens-Halske Sh IIIa. Span, 9.37 m. (30 ft. 8 7/8 in.). Length, 6.5 m. (21 ft. 4 in.). Area, 12.46 sq.m. (135 sq.ft.). Weights: Empty, 540 kg. (1,188 lb.). Loaded, 710 kg. (1,562 lb.). Speed, 220 km.hr. (137.5 m.p.h.). Climb, 6,000 m. (19,680 ft.) in 16 min. Duration, 2 hr.
W.Green, G.Swanborough The Complete Book of Fighters
SIEMENS-SCHUCKERT (SSW) D VI Germany
The SSW was awarded a contract by the Idflieg in April 1918 for the development of a single-seat parasol mono¬plane fighter powered by the Sh IIIa rotary engine, three prototypes being ordered under the designation E IV, but this being changed to D VI in the following September. A unique feature of the D VI was the provision of a jettisonable main fuel tank beneath the fuselage. No prototype was completed prior to the Armistice, but two emerged in 1919, flight trials being carried out between February and May of that year. During these one of the prototypes was destroyed and the other was allegedly sabotaged by SSW workers to prevent it falling into the hands of the Allied Control Commission.
Max speed, 137 mph (220 km/h).
Time to 19,685 ft (6 000 m), 16 min.
Range, 217 mis (350 km).
Empty weight, 1,190 lb (540 kg).
Loaded weight, 1,565 lb (710 kg).
Span, 30 ft 8 7/8 in (9,37 m).
Length, 21 ft 3 7/8 in (6,50 m).
Height, 8 ft 11 in (2,72 m).
Wing area, 134.12 sq ft (12,46 m2).