Junkers Jumo 211

The Junkers Jumo 211 was a liquid-cooled, twelve-cylinder aircraft engine with gasoline direct the Junkers aircraft and engine plants. With a capacity of 35 liters, it had a starting capacity of up to 1500 hp.

From 1937 to 1944 a total of 68 248 engines of all versions were produced and used in the most important fighter aircraft of the Luftwaffe as Junkers Ju 87, Junkers Ju 88 and Heinkel He 111. The Jumo 211, making it the most-produced German aircraft engine of World War II.

History

The Jumo 211 was a scale-up of engine block and piston kinematics of the Junkers Jumo 210 and as this is a V engine with "hanging " cylinders ( crankshaft above). With him from the Reich Air Ministry (RLM) specified target should be achieved to provide an aircraft engine with 1000 hp 500 kg mass. The magnification was performed using a pantograph from the design drawing of the Jumo 210 Due to the enlargement made ​​the Jumo 211 was called Junkers also 3/3-Maschine compared to the Jumo 210, of 2/3-Maschine.

The first experimental engine of 1935 had a carburetor and made 880 horsepower. The redesign of the Junkers of Dr. -Ing. August light (1902-1978) developed gasoline direct statements until the end of 1936. Prior runs, flight-testing and sample inspection of the engine were completed in late summer 1937. It was built in many variants from late summer 1937 to stop production in August 1944. At this time the now available and more powerful in large numbers successor type Jumo 213 took its place. The Jumo 211 was the Junkers works Magdeburg, Köthen, the Junkers subsidiaries trough Werke AG ( Muldenstein ) and Flugmotorenwerke Ostmark (Wiener Neudorf ) as well as under license in the Auto Union company belonging to the Central German motor works in diving and the Pomeranian engine GmbH in Arnimswalde (now Zalom ) produced, a subsidiary of Szczecin Stoewer works.

After the war remnants of the Jumo 211 were delivered to Spain still used in the CASA 2.111, a licensed version of the Heinkel He 111. In the Czech Avia S -199 in Czechoslovakia still existing Jumo 211 were installed in place of the DB 605.

Among the still existing engines include two specimens that derive from a Heinkel He 111 H-6. The aircraft had made ​​an emergency landing on 15 May 1940 On Swedish lake Stasjaure. The engines are being restored at the time (2013 ) in Falkenberg.

Variants

  • Jumo 211 A
  • Jumo 211 B
  • Jumo 211 D
  • Jumo 211 G, H
  • Jumo 211 F
  • Jumo 211 J
  • Jumo 211 N
  • Jumo 211 P
  • Jumo 211 Q

Specifications Jumo 211 F

  • Twelve-cylinder V- engine with overhead cylinders ( crankshaft above; too "A- Motor" called )
  • Valve control: per cylinder bank an overhead camshaft ( OHC ), three valves per cylinder ( two Einlass-/ein exhaust valve).
  • Bore: 150 mm
  • Stroke: 165 mm
  • Capacity: 35 liters
  • Compression ratio: 6.5:1
  • Mechanical loader
  • Start Power: 1340 hp ( 985 kW) at 2600 min-1
  • Pump capacity: 38.3 hp / l ( 28.2 kW / L)
  • Full pressure altitude: 5300 m
  • Cooling: liquid ( glycol / water mixture as coolant)
  • Lubrication: Dry sump lubrication with a pressure - suction pumps and two ( each a cylinder head )
  • Dry weight: 720 kg
  • Weight -related benefit: 1.86 HP / kg (1.37 kW / kg)

Swell

  • Reinhard Müller: Junkers aircraft engines. AVIATIC Verlag, 2006, ISBN 3-925505-79-2.
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