BMW IV

BMW IV
	Preserved BMW IVa
Type	Inline engine
Manufacturer	BMW
First run	1919
Developed into	BMW V; BMW VI

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 (6.30 in)
Stroke: 190 mm (7.48 in)
Displacement: 22.92 L (1,399 cu in)
Dry weight: 290 kg (640 lb)

Components

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

Performance

Power output: Nominal 230 PS (227 hp; 169 kW) , maximum continuous 250 PS (247 hp; 184 kW)
Compression ratio: 5.5:1

References

^ "BMW group". Archived from the original on 28 February 2012. Retrieved 27 July 2013.
^ bmw-grouparchiv.de Retrieved: 5 December 2016

External links

[1] "BMW group". Archived from the original on 28 February 2012. Retrieved 27 July 2013.

[2] w-grouparchiv.de Retrieved: 5 December 2016

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