Benz Bz.IV

The Benz Bz.IV was a German 6-cylinder, water-cooled, inline engine developed for aircraft use. Deliveries began in 1916 and some 6,400 were produced. It was a dual-camshaft design, with two intake and two exhaust valves per cylinder. The cylinders were cast iron surrounded by a sheet metal cooling jacket. The crankcase and pistons were of aluminium. In February 1918, pistons from such an engine fitted to an Aviatik G.130 were the first captured aluminium pistons to be examined by the British Ministry of Munitions.^[1]

Applications

• AEG C.VI
• AEG J.I
• AGO C.IV
• Albatros C.VII
• Albatros J.I
• Chitty 2 racing car
• DFW C.V
• Dobi-II
• Friedrichshafen FF.49
• Friedrichshafen G.II
• Halberstadt C.V
• Junkers J.I
• LVG C.VI
• Pfalz D.XII
• R-planes, the German giants of WWI

Specifications

General characteristics

• Type: 6-cylinder water-cooled inline aircraft piston engine
• Bore: 145 mm (5.71 in)
• Stroke: 190 mm (7.48 in)
• Displacement: 18.83 L (1,148.9 in³)
• Length: 1,990 mm (78 in)
• Width: 530 mm (20 in)
• Height: 1,150 mm (45 in)
• Dry weight: 370 kg (820 lb)

Components

• Cooling system: Water-cooled

Performance

• Power output: 170 kW (230 hp) at 1,400 rpm

References

• Kroschel, Gunter and Helmust Stützer. (1977) Die deutschen Militarflugzeuge 1910-1918 Wilhelmshaven: Lohse-Eissing Mittler.
• wwwaviation.com
• http://www.mikerlewis.com Restoration of Benz IV engine at Brussels Air Museum