Sablatnig SF-5

Designed to meet a specification by the Imperial German Navy for a higher-powered replacement for the Sablatnig SF-2s then in service, the SF-5 was a very similar aircraft other than in its choice of engine.[2][3] The first batch (serials 968–987) were delivered between January and May 1917, built in the Navy's HFT classification (unarmed reconnaissance aircraft equipped with wireless transmitter and receiver).[2] They were followed by two further batches (1224–1233 and 1352–1371) between July and September.[2] LVG built the type under licence as a trainer aircraft without any radio equipment, delivering 20 aircraft (1017–1036 and 1214–1223) during the second half of 1917.[2] LFG produced the type in the BFT category (unarmed reconnaissance aircraft equipped with wireless transmitter but not receiver), building ten examples (1459–1468) between September 1917 and February 1918.[2] Sablatnig also produced a single BFT-configured aircraft in February 1918.[2]

These machines served widely with seaplane stations throughout the North Sea and Baltic Sea.[2] The SF-5 was generally disliked by its aircrews, who dubbed it the "Lame Crow" on account of its poor banking and climbing performance and general sluggishness.[2] Crews found that the supposed cruising speed of production examples was in fact their top speed.[2] Some SF-5s perhaps saw action as bombers against Russian forces, but even those flying reconnaissance missions were easy prey for Russian fighters.[2] At least two SF-5s were captured by the Russians and put to use by them.[2]

A single SF-5 was fitted with wheeled undercarriage salvaged from another aircraft.[2] Designated SF-6 by the factory, and assigned the designation B.I by the Idflieg, it was intended to be a landplane trainer, but was not selected for production.[4]

 Germany

• Imperial German Navy

 Turkey

• Ottoman Air Force

Data from Kroschel & Stützer 1994, p.156

General characteristics

• Crew: Two, pilot and observer
• Length: 9.60 m (31 ft 6 in)
• Wingspan: 17.30 m (56 ft 9 in)
• Height: 3.55 m (11 ft 8 in)
• Empty weight: 1,052 kg (2,314 lb)
• Gross weight: 1,605 kg (3,531 lb)
• Powerplant: 1 × Benz Bz.III , 110 kW (150 hp)

Performance

• Maximum speed: 145 km/h (93 mph, 81 kn)
• Rate of climb: 1.4 m/s (282 ft/min)

• Gray, Peter; Owen Thetford (1962). German Aircraft of the First World War. London: Putnam.
• Herris, Jack (2015). German Seaplanes of WWI: Sablatnig, Kaiserliche Werften, Lübeck-Travemünde, LTG, & Oertz: A Centennial Perspective on Great War Seaplanes. Great War Aviation Centennial Series. Vol. 15. n.p.: Aeronaut Books. ISBN 978-1-935881-27-8.
• Kroschel, Günter; Helmut Stützer (1994). Die Deutschen Militärflugzeuge 1910–1918. Herford: Verlag E.S. Mittler & Sohn.
• Nelcarz, Bartolomiej & Peczkowski, Robert (2001). White Eagles: The Aircraft, Men and Operations of the Polish Air Force 1918–1939. Ottringham, UK: Hikoki Publications. ISBN 1-902109-73-2.
• Nowarra, Heinz J. (1966). Marine Aircraft of the 1914–1918 War. Letchworth, Harts: Harleyford Publications.
• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.