Bristol Cherub

The Bristol Cherub was a British manufacturer of aircraft engine Bristol. It is an air-cooled two-cylinder boxer engine. This engine was relatively widespread since its introduction in 1923 until the mid- 1930s. He was also used in Germany in the Messerschmitt M17.

Versions

There were a total of three series of this engine:

Cherub I

The cherub I was introduced in 1923 and produced until 1927. The engine weighed 41 kg, made ​​25 hp at 2500 min -1 and had only one ignition system. The bore was 85 mm and stroke of 96.5 mm, which resulted in a displacement of 1095 cc. The most popular machine in which this engine was used, the Avro may have been 562. The engine also came in some other machines are used, such as the Bristol Type 91 or the short p.4 Satellite.

Cherub II

The Cherub Cherub II corresponded to the I, but had a reduction gear of I = 2, which made ​​it possible to raise the performance-enhancing engine speed while reducing the propeller speed. The engine produced 34 hp at 4000 min-1 and weighed 49 kg. He also came in the Avro 562 and Short p4 used. The engine did not have the best reputation and was considered vulnerable.

Cherub III

The Cherub III was the most successful type. To increase the power of the engine to 90 mm ​​was drilled what 1228 cc resulted. The 1925 launched motor was manufactured from the outset with two spark plugs per cylinder, and later he was also equipped with a true dual ignition. He made 32 hp at 2900 min -1, the starting power was 36 hp at 3200 min -1. His weight was 45 kg. In addition to the Messerschmitt engine in the Mignet HM -14, Bristol Type 91, de Havilland Hummingbird, Hawker Cygnet and many other small aircraft was built.