Mercedes D.IV

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The Mercedes D.IV was a 8-cylinder, liquid cooled inline aircraft engine built by Daimler and used on a small number of German aircraft during World War I. The design was based around the pistons of the ubiquitous D.III 6-cylinder design and developed 162 kW (217 hp), making it a Class IV motor under the classification system then in use in Germany. When the reliability of the engine proved disappointing, it was supplanted in production by the unrelated 6-cylinder Mercedes D.IVa. Specifically, the long crankshaft used in extending the original straight-6 design to a straight-8 proved susceptible to breakage.

[edit] Specifications

General characteristics

• Type: 8-cylinder water-cooled inline aircraft piston engine
• Bore: 140 mm (5.5 in)
• Stroke: 160 mm (6.3 in)
• Displacement: 19.7 L (1,200 in³)
• Length: 1,990 mm (78 in)
• Width: 600 mm (24 in)
• Height: 1,040 mm (41 in)
• Dry weight: 365 kg (800 lb)

Components

• Cooling system: Water-cooled

Performance

• Power output: 162 kW (217 hp) at 1,400 rpm

[edit] Applications

• AEG C.V
• AEG G.III
• AEG G.IV
• AEG G.V
• AEG R.I
• AGO C.II
• AGO C.VIII
• Albatros C.V
• Gotha G.II
• Germany's giant aircraft of WWI the R-Planes

[edit] References

• Kroschel, Gunter and Helmust Stützer. (1977) Die deutschen Militarflugzeuge 1910-1918 Wilhelmshaven: Lohse-Eissing Mittler.
• wwwaviation.com

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