BMW R 63
In 1928, BMW released the R 63 as a 750cc sports motorcycle .
history
development
From July 1928, BMW produced the R 63 as a sporty motorcycle for the 750 cm³ class; together with the likewise new and largely structurally identical R 57 for the 500 cm³ class.
BMW continued the modular principle with this motorcycle. The chassis and gearbox with the basic engine were largely identical; The differentiation for the displacement classes with 500 cm³ and 750 cm³ and according to sports and touring models was implemented by two crankshafts with strokes different by 10 mm, matching cylinders with the same bore and head or side-controlled cylinder heads and cylinders.
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.
In September 1930, BMW advertised with a poster announcing the purchase of an R 63 by industrialist Henry Ford .
“Henry Ford, who is known to be in Munich at the moment, bought a 750 cc sports machine on Wednesday through his secretary Leibold [Ernest G. Liebold] from the manager of the Bayerische Motorenwerke sales point on Brienner Strasse because of the Henne world record which was immediately dispatched to his factory in Dramborn, Michigan at his request. "
technology
engine
The engine with the designation M 60 was a longitudinally mounted twin-cylinder boxer - four-stroke engine designed.
construction
The crankshaft and the two connecting rods ran in plain bearings for the first time - BMW continuously developed the concept of the boxer engine. The motor housing could be divided horizontally. An intermediate gear above the crankshaft drove the camshaft one level higher, which in turn drove the ignition system on the next level. This gear cascade made the engine relatively tall for a boxer engine.
cylinder
The cast iron cylinders had removable cylinder heads made of light metal and radial cooling fins.
Carburetor
The carburetor, an in-house design by BMW, sucked in the air through the flywheel housing.
The mixture quantity ("throttle slide") and mixture composition ("air slide") were set using two levers on the right-hand handlebar half.
drive
The R 63 had a manual gearbox with a drive shaft on the right side of the unsprung rear wheel.
BMW referred to the power transmission from the gearbox to the rear wheel as a " cardan drive ", the drive shaft as a " cardan shaft " and the gearbox on the rear wheel as a "cardan housing" - technically correct it was only a shaft drive of the rear wheel, as there were no cardan joints.
The horizontally divisible gearbox housing was flanged directly to the motor housing. The three-speed input shaft was driven directly by the single-plate dry clutch in the crankshaft's flywheel. The output shaft drove the drive shaft via a hardy disk in direct extension.
The housing of the bevel gear drive on the rear axle was filled with oil. The gearbox was filled with oil for the first time - on the R 42 it was still lubricated with grease.
The kick starter was actuated at right angles to the vehicle's longitudinal axis; the complex bevel gear redirection in the gearbox housing was no longer necessary.
landing gear
The chassis was a tubular frame without rear suspension, the front fork had a drawn short swing arm with leaf suspension.
The rear brake was designed as a "cardan brake" that acted on the outer ring of the hard disk.
Technical specifications
| Parameter | Data of the R 63 |
|---|---|
| drilling | 83 mm |
| Hub | 68 mm |
| Displacement | 735 cc |
| Compression ratio | 6.2: 1 |
| power | 24 hp (17.7 kW ) at 4000 min -1 |
| Top speed | 120 km / h |
| Empty weight | 152 kg |
| Tank capacity | 12.5 liters |
See also
Web links
- BMW R 63. In: BMW History. BMW AG, accessed on December 13, 2015 (dossier of the BMW Group Archives).
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 December 13, 2015 (document in the BMW Group Archive).
- ^ Paris exhibition stand of BMW 1928. In: BMW history. BMW AG, 1928, accessed on December 18, 2015 (photo in the BMW Group Archive).
- ↑ Henry Ford buys a BMW sports machine. In: BMW history. BMW AG, September 24, 1930, accessed on December 19, 2015 (document in the BMW Group Archive).
- ↑ BMW R 57 / BMW R 63 engine. In: BMW history. BMW AG, 1928, accessed on December 17, 2015 (photo in the BMW Group Archive).
- ↑ a b c manual for BMW bikes, sports models type R 57 and R 63. In: BMW history. BMW AG, November 1928, accessed on December 17, 2015 (manual with pictures, 30 pages).
- ↑ Spare parts list and tables for the BMW motorcycles sport models type R 57 and R 63. In: BMW history. BMW AG, November 1928, accessed on December 17, 2015 (document in the BMW Group Archive).
- ^ BMW R 63. In: BMW history. BMW AG, accessed on December 19, 2015 (dossier from the BMW Group Archives).
| 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 | ||||||||||||||||||||||||
