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."

Applications

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

See also

Comparable engines

Related lists

References

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