The Junkers L2 was
Junkers
Junkers Flugzeug- und Motorenwerke AG (JFM, earlier JCO or JKO in World War I, English: Junkers Aircraft and Motor Works) more commonly Junkers , was a major German aircraft and aircraft engine manufacturer. It was founded there in Dessau, Germ ...
' 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
An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...
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
Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the ...
(hp) (145 kW) at 1,550 rpm but was developed to 220 hp (164 kW).
Operational history
The L2 powered early versions of several Junkers aircraft. It was soon replaced in these models by the more powerful
Junkers L5
The Junkers L 5 was a six-cylinder, water-cooled, inline engine for aircraft built in Germany during the 1920s. First run in 1925, it was a much enlarged development of the Junkers L2.
Design and development
The Junkers L5 was a development of J ...
and only 58 L2s were built.
Variants
*L2 initial version.
*L2a refined L2, 230 hp.
Applications
Early versions of
*
Junkers F 13
The Junkers F 13 was the world's first all-metal transport aircraft, developed in Germany at the end of World War I. It was an advanced cantilever-wing monoplane, with enclosed accommodation for four passengers. 322 planes of the type were manufa ...
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Junkers A 20
Junkers A 35 was a two-seater cantilever monoplane, used for postal, training and military purposes. The aircraft was designed in the 1920s by Junkers (Aircraft), Junkers in Germany and manufactured at Dessau and by AB Flygindustri in Limhamn, Swe ...
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Junkers G 23
The Junkers G 24 was a German three-engine, all-metal low-wing monoplane passenger aircraft manufactured by Junkers from 1925. Junkers F 24 was the designation for single-engine versions of the same aircraft.
Design and development
The increas ...
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Junkers G 24
The Junkers G 24 was a German three-engine, all-metal low-wing monoplane passenger aircraft manufactured by Junkers from 1925. Junkers F 24 was the designation for single-engine versions of the same aircraft.
Design and development
The increas ...
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Junkers W 33
The Junkers W 33 was a German 1920s single-engine low-wing monoplane transport aircraft that followed Junkers standard practice making extensive use of corrugated aluminium alloy over an aluminium alloy tube frame, that was developed from the s ...
Re-engined
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Junkers Ju 21
Specifications (L2)
See also
References
Bibliography
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{{Junkers Jumo aeroengines
L2
1920s aircraft piston engines