BMW IV

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BMW IV
Preserved BMW IVa
Type	Inline engine
Manufacturer	BMW
First run	1919

The BMW IV was a six-cylinder, water-cooled inline aircraft engine built in Germany in the 1920s. Power was in the 180 kW (250 hp) range.

World record[]

On 17 June 1919 Franz Zeno Diemer flew a DFW F37, powered by a BMW IV engine to an unofficial world record height of 9,760 m (32,021 ft) from Oberwiesenfeld, reaching that altitude in 89 minutes.^[1] Diemer stated at the time, "I could have gone much higher, but I didn't have enough oxygen."^{[citation needed]}

Applications[]

• Arado SC I
• Albatros L 72
• Albatros L 74
• Caspar C 27
• DFW F37
• Heinkel HD 22
• Heinkel HD 24
• Heinkel HD 39
• Junkers A 35
• Junkers F 13
• LFG V 59
• LFG V 60
• Polikarpov R-1 BMW (Soviet unlicensed copy of Airco DH.9A)
• Rohrbach Ro VII Robbe
• Rohrbach Ro VIII Roland I
• Type 91 Heavy Tank
• Type 95 Heavy Tank

Specifications[]

Data from BMW Type IV description and user manual.^[2]

General characteristics

• Type: Six-cylinder inline piston engine
• Bore: 160 mm
• Stroke: 190 mm
• Displacement: 23 L
• Dry weight: 290 kg

Components

• Valvetrain: Overhead camshaft, two valves per cylinder
• Cooling system: Water-cooled

Performance

• Power output: Nominal 230 PS, maximum continuous 250 PS
• Compression ratio: 5.5:1

See also[]

Comparable engines

• Liberty L-6 (United States)

Related lists

• List of aircraft engines

References[]

External links[]

Wikimedia Commons has media related to BMW IV.