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BMW VI
The BMW VI was a water-cooled V-12 aircraft engine built in Germany in the 1920s. It was one of the most important German aero engines in the years leading up to World War II, with thousands built. It was further developed as the BMW VII and BMW IX, although these saw considerably less use. It was also produced in the Soviet Union as the M-17 and Japan as the Kawasaki Ha-9.

General characteristics:
    Type: V-12
    Bore: 160 mm (6.30 in)
    Stroke: 190 mm (7.48 in)/199 mm (7.83 in) different between right and left cylinder bank
        due to articulated connecting rods.
    Displacement: 46.93 L (2,864 cu in)
    Length: 1,810 mm (71.26 in)
    Width: 859 mm (33.82 in)
    Height: 1,103 mm (43.43 in)
    Dry weight: 510 kg (1,124 lb)

Components:
    Fuel system: 2 x Zenith 60 DCL
    Fuel type: min. 87 octane gasoline
    Cooling system: Liquid-cooled

Performance:
    Power output:
        Crusing: 500HP @ 1,500RPM
        Emergency (one Minute): 750HP @ 1,700 RPM
    Compression ratio: 5.50

Applications:
– Arado Ar 64
– Arado Ar 65
– Arado Ar 68
– Dornier Do 10
– Dornier Do 14
– Dornier Do 17
 – Focke-Wulf Fw 42
– Heinkel He 45
– Heinkel He 51
– Heinkel He 59
– Heinkel He 60
– Heinkel He 70
Sources:
Wikipedia
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