The W.25 was an improved version of the KDW with a modified biplane cellule with conventional inter-plane struts. One prototype was built (s/n 2258), and the aircraft competed with the Albatros W.4, but the W.4 demonstrated a better flight performance. Therefore, Hansa-Brandenburg returned the W.25 to its factory for modification with a second pair of ailerons on the lower wing. However, the W.25 was not ordered into production because the Imperial German Navy lost interest in single-seat fighters.

Data from ,^[2] German Aircraft of the First World War^[3]

General characteristics

• Crew: 1
• Length: 8.8 m (28 ft 10 in)
• Wingspan: 10.4 m (34 ft 1 in)
• Height: 3.45 m (11 ft 4 in)
• Wing area: 36.53 m² (393.2 sq ft)
• Empty weight: 918 kg (2,024 lb)
• Gross weight: 1,182 kg (2,606 lb)
• Powerplant: 1 × Benz Bz.III 6-cylinder water-cooled in-line piston engine, 110 kW (150 hp)
• Propellers: 2-bladed fixed-pitch propeller

Performance

• Maximum speed: 160 km/h (99 mph, 86 kn)
• Endurance: 2 hours 30 minutes
• Time to altitude: 1,000 m (3,300 ft) 6 minutes 30 seconds

Armament

• Guns: 2 x fixed forward-firing synchronised 7.92 mm (0.312 in) LMG 08/15 Spandau machine guns

Related lists

• List of flying boats and floatplanes

• Herris, Jack (2012). German Seaplane Fighters of WWI: A Centennial Perspective on Great War Seaplanes. Great War Aviation Centennial Series. Vol. 2. Charleston (S.C.): Aeronaut Books. ISBN 978-1-935881-09-4.
• Owers, Colin A. (2015). Hansa-Brandenburg Aircraft of WWI: Volume 2–Biplane Seaplanes. Great War Aviation Centennial Series. Vol. 18. n.p.: Aeronaut Books. ISBN 978-1-935881-32-2.