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Sablatnig SF.3/SF.7

Страна: Германия

Год: 1917

Fighter

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


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 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 Seaplanes of WWI (A Centennial Perspective on Great War Airplanes 15)


Sablatnig SF3

  Sablatnig produced two two-seat floatplane fighter designs. First was the SF3 shown here, a sturdy-looking aircraft powered by a 200 hp Benz Bz.IV. Armament was one fixed, forward-firing gun for the pilot and a flexible gun for the observer.
  The relatively low drag of the streamlined, ply-covered fuselage was more than compensated for by its multitude of struts and bracing wires, flying qualities were unsatisfactory, and it remained a single prototype. No further details are known.


Sablatnig SF7
  
  Developed from the earlier SF3 prototype, the SF7 was designed as a two-seat floatplane fighter in the C2MG category. Powered by the 240 hp Maybach Mb.IV, three aircraft, Marine Numbers 1475-1477, were ordered, although #1475 may have been the only one built. The SF7 featured I-struts for better streamlining and the inboard wing bay was strut-braced and wireless. The SF7 was a large aircraft that looked more like a conventional two- seat reconnaissance airplane than a fighter. However, it had ailerons on all wings assisted by servo tabs to reduce the pilot's control forces; those may have given it better maneuverability than expected for its size. The SF7 was faster than the competing Brandenburg W19 biplane that used the same engine, but slower than the W33 monoplane that also used the same engine. However, the Brandenburg W12 and its derivatives were robust, maneuverable aircraft with excellent combat records, and the SF7 was not placed in production.


SF3 was powered by a 220 hp Benz Bz.IV; no other data available.

Sablatnig SF-Series Specifications
SF5 (#1361) SF6 SF7 SF8
Engine 150 hp Benz Bz.III 150 hp Benz Bz.III 240 hp Maybach Mb.IV 150 hp Benz Bz.III
Span 17.3 m 17.3 m - 16.0 m
Length 9.6 m 8.3 m - 10.2 m
Wing Area 50.5 m2 - - 54.6 m2
Wt. Empty 1,052 kg - - 1,183 kb
Wt. Loaded 1,605 kg - 2,120 kg 1,574 kg
Speed 148 km/h - 162 km/h 130 km/h
Climb:
1,000 m 11.6 minutes - 8 minutes 14.7 minutes
1,500 m - - - -
2,000 m 21.8 minutes - - 24.8 minutes
3,000 m - - 36 min. -
Armament None None 1 Spandau & 1 Parabellum None

J.Herris - German Seaplanes of WWI /Centennial Perspective/ (15)
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 Seaplanes of WWI /Centennial Perspective/ (15)
The sole prototype of the SF 3 escort fighter proved to possess unsatisfactory characteristics.
J.Herris - German Seaplanes of WWI /Centennial Perspective/ (15)
The Sablatnig SF3 prototype was finished in the standard late-war naval camouflage.
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 Seaplanes of WWI /Centennial Perspective/ (15)
The SF7 was a massive aircraft, looking more like a typical reconnaissance floatplane than a two-seat fighter. The competing W19 proved to be superior and was placed in production. Marine #1475 was the first of three prototypes.
J.Herris - German Seaplane Fighters of WWI /Centennial Perspective/ (2)
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 Seaplanes of WWI /Centennial Perspective/ (15)
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 Friedrichshafen FF48 was the third competitor for this requirement. 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.