GB Ec 3/4
| GB Ec 3/4 | ||
|---|---|---|
| Type designation: | Ec 3/4 | |
| Numbering: | 81–88 from 1885: 181–188 |
89–92 from 1885: 189–192 |
| Number: | 8th | 4th |
| Manufacturer: | Esslingen | SLM |
| Year of construction (s): | 1882 | 1883 |
| Retirement: | 1914-1933 | |
| Type : | 1'C 2n | |
| Gauge : | 1435 mm ( standard gauge ) | |
| Length over buffers: | 10335 mm | |
| Fixed wheelbase: | 3400 mm | |
| Empty mass: | 46.2 t | 48.0 t |
| Service mass: | 60.5 t | 62.6 t |
| Friction mass: | 48.2 t | 50.0 t |
| Wheel set mass : | 15.1 t | 15.7 t |
| Top speed: | 65 km / h | |
| Starting tractive effort: | 5500 kp | |
| Driving wheel diameter: | 1330 mm | |
| Number of cylinders: | 2 | |
| Cylinder diameter: | 380 mm | |
| Piston stroke: | 600 mm | |
| Boiler overpressure: | 12 atm | |
| Indexed performance : | 500 hp | |
| Water supply: | 7.0 m³ | 7.4 m³ |
| Fuel supply: | 2.5 t | 2.5 t |
| Brake: |
Spindle brake , counter-pressure brake , No. 81–88 and 91 from 1885 with Hardy system vacuum brake , 1890–1894 replacement with double Westinghouse brake |
|
The Ec 3/4 were wet steam tank locomotives of the Gotthard Railway Company (GB), which were delivered in two series in 1882 and 1883. At the SBB , the locomotives were given the numbers 6581-6592.
procurement
The Gotthard Railway Company procured eight Mogul tender locomotives from the Esslingen machine factory for the transport of goods trains on the valley lines and passenger trains on the mountain routes. A year later, the Swiss Locomotive and Machine Factory (SLM) in Winterthur delivered four more locomotives, which differed from the Esslingen machines by a different shape of the driver's cab. In the Winterthur version, the coal box was located outside the driver's cab to avoid dust inside. The tank locomotives largely corresponded to the D 3/3 No. 51-66 tender locomotives built in Esslingen at the same time . Thanks to the identical boiler and engine dimensions of both vehicle types, common spare parts could be used.
designation
The designation of the machines was changed several times. They were put into operation as the CI series with the numbers 81–92. In 1887 the designation changed to B 3 and in 1902 to Ec 3/4 according to the usual Swiss scheme . In 1895 the numbers were changed from 81–92 to 181–192. After the nationalization, the twelve machines at SBB carried the numbers 6581-6592.
business
The Gemischtzuglokomotiven were mostly on the track over the Monte Ceneri between Bellinzona and Lugano used and because of their smooth running, their small wheel flange wear and the large tensile force of 5500 kp appreciated. The machines had a trailer load of 130 to 145 t on the mountain routes and from 380 to 600 t on the valley routes. They were scrapped between 1914 and 1933.
Mixed train locomotive Ec 3/4 No. 185, built in Esslingen in 1892
Locomotive Ec 3/4 No. 189, built by SLM in 1883
Ec 3/4 No. 190, built by SLM in 1883
literature
- Alfred Moser: The steam operation of the Swiss railways 1847-1966 . 4th updated edition, Birkhäuser, Stuttgart 1967.