O.Thetford, P.Gray German Aircraft of the First World War (Putnam)
Sablatnig SF 3
Designed as a two-seat seaplane fighter for escort and offensive patrols, only the single aircraft (No. 619) was built. It was a neat-looking machine with ply-covered fuselage. Engine, 220 h.p. Benz Bz IV. No other data available.
Sablatnig SF 7
Developed from the SF 3, again as a two-seat fighter seaplane, the SF 7 was fitted with the powerful 240 h.p. Maybach motor. Three aircraft were built, Nos. 1475-1477, and accepted by the Navy in September 1917. The I-type interplane struts are noteworthy, also the inboard wire-less bay braced by rigid diagonal struts from the top longerons. Engine, 240 h.p. Maybach Mb IV. Weight: Loaded, 2,120kg. (4,664 lb.). Speed, 162 km.hr. (101.25 m.p.h.). Climb, 1,000 m. (3,280 ft.) in 8 min., 3,000 m. (9,840 ft.) in 36 min. Armament, one Spandau and one Parabellum machine-guns.
W.Green, G.Swanborough The Complete Book of Fighters
SABLATNIG SF 3 Germany
Designed by the Sablatnig-Flugzeugbau of Berlin to meet a requirement for a two-seat fighter for escort and offensive patrols, the SF 3 was a large twin-float, two- bay biplane, a single prototype of which was flown in 1916. Powered by a 200 hp Benz Bz IV six-cylinder water-cooled engine with a "rhino horn” type exhaust pipe and lateral ear-type radiators, the SF 3 had a ply-covered fuselage and an armament of one fixed forward-firing 7,9-mm LMG 08/15 machine gun and a swivelling Parabellum in the rear cockpit. The SF 3 displayed unsatisfactory characteristics and development was discontinued. No further details are recorded.
SABLATNIG SF 7 Germany
When the Marineflieger formulated a requirement for a longer-range two-seat waterborne fighter, the Sablatnig-Flugzeugbau developed the SF 7 in competition with the Friedrichshafen FF 48 and the Brandenburg W 19, three prototypes of each being ordered in April 1917. The SF 7 was a two-bay twin-float biplane with I-type interplane struts and rigid diagonal struts bracing the inboard wireless bay. Power was provided by a six-cylinder water-cooled Maybach Mb IV engine of 240 hp and armament consisted of a single fixed 7,9-mm LMG 08/15 machine gun and a Parabellum on a flexible mounting in the rear cockpit. The SF 7s were accepted by the Navy in September 1917, but comparative trials with the W 19 proved the superiority of the Brandenburg design, which was selected to fulfil the requirement.
Max speed, 101 mph (164 km/h) at sea level.
Ceiling, 14,765 ft (4 500 m).
Range, 466 mis (750 km).
Empty weight, 3,433 lb (1557 kg).
Loaded weight, 4,665 lb (2116 kg).
Span, 51 ft 0 1/2 in (15,58 m).
Length, 30 ft 2 1/4 in (9,20 m).
Height, 12 ft 1 2/3 in (3,70 m).
Wing area, 571.9 sq ft (53,13 m2).
J.Herris German Seaplane Fighters of WWI (A Centennial Perspective on Great War Airplanes 2)
Sablatnig, a small firm that specialized in seaplanes, produced two two-seat floatplane fighter designs. First was the SF3, a sturdy-looking aircraft powered by a 220 hp Benz Bz.IV. The drag of the streamlined fuselage was more than compensated for by its multitude of struts and bracing wires, and it remained a single prototype.
The SF7, powered by a 240 hp Maybach Mb.IVa, was the second Sablatnig design for a two-seat naval fighter. It had good speed but despite that only three, Marine Numbers 1475-1477, were built.