SCB Ed 2x2 / 2
| SCB Ed 2x2 / 2 | ||
|---|---|---|
 |
||
| Numbering: | SCB 181-186 SBB 7681-7686 |
SCB 187-196 SBB 7687-7696 |
| Number: | 6th | 10 |
| Manufacturer: | Maffei | |
| Year of construction (s): | 1891 | 1893 |
| Retirement: | 1910-1938 | |
| Axis formula : | B + B | |
| Type : | Composite | |
| Gauge : | 1435 mm ( standard gauge ) | |
| Length over buffers: | 11517 mm | 10400 mm |
| Fixed wheelbase: | 1900 mm | |
| Empty mass: | 48.6 t | 44.4-46.1 t |
| Service and friction mass: |
60.4 t | 58.8-60.6 t |
| Top speed: | 55 km / h | |
| Driving wheel diameter: | 1280 mm | 1200 mm |
| Number of cylinders: | 4th | |
| LP cylinder diameter: | 550 mm | 540 mm |
| HD cylinder diameter: | 355 mm | 350 mm |
| Piston stroke: | 640 mm | 610 mm |
| Number of heating pipes: | 169 | 162 |
| Heating pipe length: | 4000 mm | 3850 mm |
| Grate area: | 1.8 m² | 1.7 m² |
| Radiant heating surface: | 7.8 m² | 7.3 m² |
| Evaporation heating surface: | 113.0 m² | 105.2 m² |
| Water supply: | 5.0 m³ | 7.2 m³ |
| Fuel supply: | 2.0 t (coal) | 3.3 t (coal) |
The Swiss Central Railway ( SCB ) ordered tender steam locomotives of the type Ed 2x2 / 2 from Maffei in Munich in 1891 . For the time being, the railway company acquired six vehicles based on the Mallet system . The design was developed a little further, and in 1893 10 more locomotives were added. Between 1897 and 1900 a second series of Mallet locomotives was delivered by SLM in Winterthur, which, however, in contrast to the first series, were built as a tender locomotive ( see SCB D 2 × 2/2 ).
history
The Swiss Central Railways had to increase their freight locomotives in the early 1890s. Since the Bourbonnais- type locomotives previously used for this purpose were already out of date, only a quadruple-coupled machine came into question for freight train service. However, there were concerns that a D-wheel arrangement locomotive could cause a number of problems, especially on the winding Hauenstein route. After the Ed 2x3 / 3 had been delivered to the Gotthard Railway Company in 1890, the decision was made to purchase machines of the Mallet type, which, however, were only equipped with four drive wheels.
Technical
The locomotives were based heavily on the GB Ed 2x3 / 3, of course reduced in size according to the lower number of axles. The same mistakes were made here and the machine had a too small (weak) boiler.
Two locomotives received a new boiler from SBB, this was the 7691 (SCB 191) in 1905 and the 7684 (SCB 184) in 1909.
Operational
After the takeover by the SBB, the locomotives were assigned to District II and thus remained assigned to their old home workshop in Olten.
Locomotive 196
The locomotive No. 196 still exists today. It was mainly used at Hauenstein and in front of freight trains and was assigned to the Olten depot . In 1915 she was transferred to the Le Pont – Le Brassus line . It was discarded in 1938 and drawn in Villeneuve . In 1958, the restoration work began in Biel , and from 1959 to 1974 she stayed in the Lucerne Museum of Transport . It should be made fit for exhibitions. In 1992 it was taken over by the steam group of the Oensingen-Balsthal-Bahn and handed over to historical operation.
Literature / sources
- Alfred Moser: The steam operation of the Swiss railways 1847-1966 . 4th updated edition, Birkhäuser, Stuttgart 1967. S. 194ff