BMW VI

The BMW VI (later denoted by BMW 106 ) was a liquid-cooled, twelve- cylinder aircraft engine from BMW with a displacement of 46.9 liters.

The 1926-1937 series-produced twelve-cylinder V-engine was the first of the company and put the end link of the older liquid-cooled BMW aircraft engines dar. with solitary cylinders

History

After June 1923, the Junkers Flugzeugwerke had ordered 100 engines of the type BMW IIIa, BMW took over the production of aircraft engines again.

The Reichswehr was very interested in a twelve-cylinder engine and gave BMW 1924 official development contract. Thus, it was hoped, following the French and British twelve-cylinder aircraft engines - like the Renault 12 Kb or the Napier Lion V - produced with capacities of more than 450 hp.

This was based on the six-cylinder in-line engine BMW IV, which was expanded by another at an angle of 60 ° according to a stationary cylinder bank in 1919 projected concept. The development under the guidance of Max Friz was therefore completed in 1925. The engine already obtained on February 8, 1926 at the German Experimental Institute for Aviation ( DVL ) in Berlin- Adlershof sample testing and therefore the approval for installation in German aircraft.

The BMW VI had the usual for aircraft engines Doppelzündanlage with two spark plugs per cylinder and two Bosch magnetos with automatic or manual ignition timing. The annealing was done either with an inertia starter or with compressed air. The Pressure lubrication was ensured by means of a gear pump. Each cylinder bank had an overhead camshaft, each operated an inlet and outlet valve.

According to the type certificate serial production was still 1926 on. 1930 BMW already delivered from the thousandth engine. 1933 were carried out with direct gasoline injection with this type first attempts.

The BMW VI was extremely frugal and was considered very reliable. The German Luft Hansa used in Südatlantikverkehr flying boats Dornier Do J "Wal " with this engine. The used by Amundsen on his Arctic expedition two Dornier Wal also flew with BMW VI engines. Thanks to the reliability of the engine reach several record flights, the flight around the world in 1930 by Wolfgang von Gronau with a Dornier Wal. The 1930 -built Rail Zeppelin also had a BMW VI engine.

Once BMW had in the United States acquired in 1928 the license for reproduction of the air-cooled nine-cylinder radial engine Pratt & Whitney R- 1690 (P & W Hornet A), the production of concentrated since 1933 on the developed from the BMW 132 and the construction of the BMW VI engines was discontinued in 1937.

The Auto and Technik Museum Sinsheim uses a BMW VI Line 8 in his experimental vehicle " Brutus ".

License agreements gave it to both Japan and the USSR, where the engine was manufactured as Mikulin M -17. But from this 27 534 units were built 1930-1942 in different variants. From the M -17 M -34 was developed, its serial production began in 1932.

Use

The BMW VI was used among others in the following aircraft:

Specifications

By using Anlenkpleueln results in a different stroke of the two cylinder banks, so the displacement of the motor output BMW IV doubled over.

Engine displacement Robert Bosch GmbH Schienenzeppelin Alexander Mikulin Bore (engine) List of aircraft engines
134038
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