BMW IV
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.
| BMW IV | |
|---|---|
![]()  | |
| Preserved BMW IVa | |
| Type | Inline engine | 
| Manufacturer | BMW | 
| First run | 1919 | 
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
 - 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
 
References
    
- "BMW group". Retrieved 27 July 2013.
 - bmw-grouparchiv.de Retrieved: 5 December 2016
 
External links
    
| Wikimedia Commons has media related to BMW IV. | 
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