The Dornier Do 11 was a German heavy bomber, developed in secret in the early 1930s. It was originally called the Dornier F before being renamed by the Reichsluftfahrtministerium (RLM) in 1933, and was considered a heavy bomber at the time. It came into service in 1932, a continuation of a line of bomber designs from the Dornier Do P in 1930, and the Dornier Do Y in 1931. The line would continue to develop with the Dornier Do 13 and Dornier Do 23. General characteristicsCrew: fourLength: 18.8 m (61 ft 8 in)Wingspan: 26.3 m (86 ft 3 in)Height: 5.49 m (18 ft 0 in)Wing area: 107.8 m2 (1,160 sq ft)Empty weight: 5,978 kg (13,179 lb)Max takeoff weight: 8,200 kg (18,078 lb)Fuel capacity: 1,545 L (340 imp gal)Powerplant: 2 × Siemens-Halske Sh.22B-2 9-cyl. air-cooled radial piston engines, 485 kW (650 hp) each for take-off, 447 kW (599 hp) at 1,500 m (4,921 ft)Propellers: 4-bladed fixed pitch wooden propellersPerformanceMaximum speed: 260 km/h (160 mph, 140 kn)Cruise speed: 225 km/h (140 mph, 121 kn) at 1,000 m (3,281 ft)Range: 960 km (600 mi, 520 nmi) with 1,545 L (340 imp gal) of fuelService ceiling: 4,100 m (13,500 ft)ArmamentGuns: 3 x manually aimed 7.92 mm (0.312 in) MG 15 machine guns, 1 in each of open nose, dorsal and ventral positionsBombs: up to 1,000 kg (2,205 lb) of bombs. ag 1-3 none ag 4 autopilot ag 5-7 guns