GB Ed 2/2
| GB Ed 2/2 | |
|---|---|
 |
|
| Numbering: | GB 1-6 SBB 8061-8066 |
| Number: | 6th |
| Manufacturer: | SLM |
| Year of construction (s): | 1874, 1883 |
| Retirement: | 1910-1915 |
| Axis formula : | B. |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 8612 mm |
| Fixed wheelbase: | 2600 mm |
| Total wheelbase: | 2600 mm |
| Empty mass: | 22 t |
| Service mass: | 29 t |
| Friction mass: | 29 t |
| Wheel set mass : | 15 t |
| Top speed: | 50 km / h |
| Indexed performance : | 300 hp |
| Driving wheel diameter: | 1330 mm |
| Number of cylinders: | 2 |
| Cylinder diameter: | 360 mm |
| Piston stroke: | 600 mm |
| Boiler overpressure: | 10 atm. |
| Number of heating pipes: | 133 118 1 |
| Heating pipe length: | 3500 mm |
| Grate area: | 1.1 m² 0.9 m² 1 |
| Radiant heating surface: | 6.1 m² 5.3 m² 1 |
| Evaporation heating surface: | 80.5 m² 70.3 m² 1 |
| Water supply: | 3 m³ |
| Fuel supply: | 1 t |
| Brake: | Spindle handbrake |
The Gotthard Railway Company ( GB ) purchased a total of six type Ed 2/2 tank locomotives in 1874 and 1883 . These were obtained from SLM in Winterthur at a price of 51,000 Swiss Francs.
Technical
The boiler dimensions of the two machines delivered in 1883 differ from the four machines delivered first ( marked with 1 in the table ).
The center of the boiler was 1950 mm above the top of the rail. The boiler of the first four machines did not have a steam dome , but a collecting pipe. On the manhole cover was a Ramsbottom - safety valve mounted. The boiler of the two later machines was smaller and had a steam dome. Furthermore, thanks to their external inlet pipes, these machines could also be used as a stationary steam generation system. The Ramsbottom safety valve was also on the steam dome and not on the manhole cover.
The inner frame of the locomotive also formed a two-part water box. The rear axle was arranged in front of the fire box so that the machines overhanged to the rear. The external control was one of the Walschaert type with lever reversal and overhead control shaft. The piston rods were passed forward. The suspension consisted of two springs over the first axle, which stood lengthways over the frame. The rear axle was supported by two transverse springs standing upright above the axle. The sand container was designed as a sand dome on the boiler above the first axis.
The coal supply was carried in boxes at the rear of the driver's cab. This was open on the sides and inwards.
The brake was initially a two-block spindle handbrake, which was supplemented from 1893 by a four-block Westinghouse brake . The air tanks for the train's regulating brake were located above the boiler.
Steam heating was installed from 1887, and a Klose speedometer was installed around 1893.
The pulling force is given as 3000 kg and the line with 300 HP.
| GB number | SBB number | Factory number |
Construction year | Manufacturer | Discarded |
|---|---|---|---|---|---|
| 1 | 8061 | 52 | 1874 | SLM | 1910 |
| 2 | 8062 | 53 | 1874 | SLM | 1912 |
| 3 | 8063 | 54 | 1874 | SLM | 1910 |
| 4th | 8064 | 55 | 1874 | SLM | 1912 |
| 5 | 8065 | 330 | 1883 | SLM | 1914 |
| 6th | 8066 | 331 | 1883 | SLM | 1915 |
Operational
The first four machines were purchased for the valley railway in Ticino. There they should be usable for mixed trains.
Literature / sources
- Alfred Moser: The steam operation of the Swiss railways 1847-1966 . 4th updated edition, Birkhäuser, Stuttgart 1967. S. 86ff