|Type||4-stroke petrol 6-cylinder water-cooled inline aircraft engine|
|Manufacturer||Junkers Motorenbau GmbH (Jumo)|
The Junkers L2 was Junkers' first water-cooled four-stroke engine and the first to be built on a production line, though only 58 were made. It was a six-cylinder inline engine and powered many Junkers aircraft until replaced by the more powerful L5.
Design and development
The Junkers L2 (the L signifying a four-stroke petrol engine rather than a two-stroke diesel) had some features in common with their first petrol engine, the L1, both six-cylinder upright direct drive inline engines with four overhead camshaft driven valves per cylinder, but was water-cooled rather than air-cooled and had a much greater swept volume. It initially developed a cruise power of 195 horsepower (hp) (145 kW) at 1,550 rpm but was developed to 220 hp (164 kW).
- L2 initial version.
- L2a refined L2, 230 hp.
Early versions of
Data from Kay (2004) pp.263-4
- Type: 6-cylinder upright water-cooled inline 4-stroke piston engine
- Bore: 150 mm (5.906 in)
- Stroke: 180 mm (7.09 in)
- Displacement: 19.1 L (1,166 cu in)
- Length: 1.58 m (5 ft 2¾ in)
- Width: 0.555 m (1 ft 9¾ in)
- Height: 1.085 m (3ft 6¾ in)
- Dry weight: 310 kg (684 lb)
- Valvetrain: Two inlet and two exhaust valves per cylinder, overhead camshaft operated
- Fuel system: Twin carburettors
- Fuel type: Petrol
- Oil system: Combined splash and pressure
- Cooling system: Water-cooled
- Reduction gear: Direct drive
- Power output: cruise 195 hp (145 kW) at 1,550 rpm, take-off 230 hp (171 kW)
- Fuel consumption: 31.82 kg/h (70.16 lb/hr)
- Related lists
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