BMW R 57
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The model R 57 is a 1928 to 1929 of BMW produced motorcycle with two-cylinder - Boxer - four-stroke engine and shaft drive . As a sports model with OHV engine, it was the sister model of the R 52 , which was designed as a touring model.
history
development
From July 1928, BMW produced the R 57 as a sporty motorcycle for the 500 cm³ class; together with the likewise new and largely identical R 63 for the 750 cm³ class.
marketing
The product launch - initially the two touring motorcycles R 52 and R 62 and shortly afterwards the two sports models R 57 and R 63 - took place on a modest scale, because the new models with pressed steel frames were presented at the German Motor Show in Berlin in November 1928 . BMW exhibited the tubular frame models again in October 1928 at a large stand at the Salon de l'Automobile in Paris.
Design features
The frame was welded from tubular steel and, due to its great stability, was suitable for sidecar use.
engine
As in the previous models, the BMW R 47 and BMW R 37, the engine was a longitudinally installed two-cylinder boxer four-stroke engine with OHV valve control . Starting with engine number 70889, the single- disk dry clutch was replaced by a two- disk dry clutch.
drive
The R 57 had a manual three-speed gearbox. The entire drive train was encapsulated against dirt and moisture and, apart from the seldom required oil change, was maintenance-free, in contrast to the chain drives that were almost always unencapsulated at the time.
Technical specifications
| Parameter | Data of the R 57 |
|---|---|
| drilling | 68 mm |
| Hub | 68 mm |
| Displacement | 492 cc |
| power | 18 hp (13 kW ) at 4000 min -1 |
| Empty weight | 150 kg |
| Tank capacity | 12.5 liters |
See also
literature
- Tragatsch: All motorcycles . ISBN 3-87943-410-7 .
Web links
- BMW R 57. In: BMW History. BMW AG, accessed on July 2, 2020 (dossier of the BMW Group Archives).
- Manual for BMW bikes, sports models type R 57 and R 63. In: BMW history. BMW AG, November 1928, accessed on July 2, 2020 (manual with pictures, 30 pages).
- Spare parts list and boards for the BMW motorcycles sport models type R 57 and R 63. In: BMW history. BMW AG, November 1928, accessed on July 2, 2020 (document in the BMW Group Archive).
Individual evidence
- ↑ a b Start of production of the motorcycle models R 52, R 62, R 57 and R 63. In: BMW history. BMW AG, July 1928, accessed on July 2, 2020 (document in the BMW Group Archive).
- ^ Paris exhibition stand of BMW 1928. In: BMW history. BMW AG, 1928, accessed on July 2, 2020 (photo in the BMW Group Archive).
- ↑ BMW R 57 / BMW R 63 engine. In: BMW history. BMW AG, 1928, accessed on July 2, 2020 (photo in the BMW Group Archive).
| class | Type | 1920s | 1930s | 1940s | ||||||||||||||||||||
| 3 | 4th | 5 | 6th | 7th | 8th | 9 | 0 | 1 | 2 | 3 | 4th | 5 | 6th | 7th | 8th | 9 | 0 | 1 | 2 | 3 | 4th | 5 | ||
| up to 250 cm³ | Touring motorcycle | R 2 | R 20 | |||||||||||||||||||||
| R 23 | ||||||||||||||||||||||||
| Sport motorcycle | R 39 | |||||||||||||||||||||||
| up to 500 cm³ | Touring motorcycle | R 32 | R 42 | R 52 | R 4 | |||||||||||||||||||
| R 3 | R 35 | |||||||||||||||||||||||
| Sport motorcycle | R 37 | R 47 | R 57 | R 5 | R 51 | |||||||||||||||||||
| up to 750 cm³ | Touring motorcycle | R 62 | R 11 | R 12 | R 71 | |||||||||||||||||||
| R 6 | R 61 | |||||||||||||||||||||||
| Sport motorcycle | R 63 | R 16 | R 17 | R 66 | ||||||||||||||||||||
| Prototypes, racing bikes | R 7 | |||||||||||||||||||||||
| WR 750 | R 51 RS | |||||||||||||||||||||||
| Military motorcycles | R 12 | |||||||||||||||||||||||
| R 75 team | ||||||||||||||||||||||||
