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.

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.^[1] It initially developed a cruise power of 195 horsepower (hp) (145 kW) at 1,550 rpm but was developed to 220 hp (164 kW).^[2]

The L2 powered early versions of several Junkers aircraft. It was soon replaced in these models by the more powerful Junkers L5 and only 58 L2s were built.^[1]

• L2 initial version.
• L2a refined L2, 230 hp.^[1]

Early versions of^[1]

• Junkers F 13
• Junkers A 20
• Junkers G 23
• Junkers G 24
• Junkers W 33

Re-engined^[3]

• Junkers Ju 21

Data from Kay (2004), pp. 263–264

Related lists

• List of aircraft engines