/ Hansa-Brandenburg W.12
The Hansa-Brandenburg W.12 was a German biplane fighter floatplane of World War I.
It was a development of Ernst Heinkel’s previous KDW, adding a rear cockpit for an observer/gunner, and had an unusual inverted tailfin/rudder in order to give an uninterrupted field of fire.
The W.12s served on the Western Front, based at the Naval air bases at Ostend and Zeebrugge.
The aircraft had some success, and one shot down the British airship C.27.
In April 1918, a W.12 made an emergency landing in the neutral territory of the Netherlands, where it was interned and flight tested by the Dutch.
In 1919 the government of the Netherlands bought a licence to build the aircraft.
35 W.12s were subsequently manufactured by the Van Berkel company of Rotterdam as the W-A, serving with the Dutch Naval Air Service until 1933.
German Navy model.
Van Berkel W-A
Dutch licence built W.12, with Benz engine.
9.6 m (31 ft 6 in)
3.3 m (10 ft 10 in)
36.2 m2 (390 sq ft)
997 kg (2,198 lb)
1,454 kg (3,206 lb)
1 × Mercedes D.III 6-cylinder water-cooled in-line piston engine, 119 kW (160 hp)
2-bladed fixed-pitch propeller
160 km/h (99 mph, 86 kn)
520 km (320 mi, 280 nmi)
3 hours 30 minutes
5,000 m (16,000 ft)
1 or 2 × fixed forward 7.92 (0.312 in) Lmg 08 machine guns
1 × 7.92 (0.312 in) Parabellum MG14 in rear cockpit
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