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Sablatnig SF.3/SF.7

Страна: Германия

Год: 1917


Sablatnig - C.I/C.II/N.I/P.I - 1917 - Германия<– –>Sablatnig - SF.4 - 1917 - Германия

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


  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.


  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 SF3

  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.

Sablatnig SF7

  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.

J.Herris - German Seaplane Fighters of WWI /Centennial Perspective/
The Sablatnig SF3 was compact for a two-seat fighter. However, the SF3 featured a profusion of struts and bracing wires that certainly created more drag than the cleverly-designed W12 and only one prototype was built.
J.Herris - German Seaplane Fighters of WWI /Centennial Perspective/
The sole prototype of the SF 3 escort fighter proved to possess unsatisfactory characteristics.
Jane's All The World Aircraft 1919 /Jane's/
An 160 h.p. Benz-engined Sablatnig Seaplane of SF 5 (1917) type, largely used by the German Navy.
J.Herris - German Seaplane Fighters of WWI /Centennial Perspective/
The SF7 was a massive aircraft, looking more like a typical reconnaissance floatplane than a two-seat fighter. It probably lacked maneuverability competitive with that of the W19. Marine #1475 was the first of three prototypes.
J.Herris - German Seaplane Fighters of WWI /Centennial Perspective/
The Sablatnig SF7 was in the W19 class and was powered by the same engine. Although somewhat faster than the W19, only three were produced. The I-struts appear to interfere with the crews' field of view.
Three examples of the SF 7 built in 1917 were accepted by the Marineflieger for evaluation.