NOB B 2/4
| NOB B 2/4 | |
|---|---|
 Steam locomotive "Toess" number 5 in Zurich main station
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| Numbering: | 5-10,13-14,20,23-24,27-28,32-33 later 51-66 / 98-99 |
| Number: | 16 |
| Manufacturer: | Maffei ( Escher Wyss ) |
| Year of construction (s): | 1854-1862 |
| Retirement: | 1887-1903 |
| Axis formula : | 2 B |
| Genre : | Passenger locomotive |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 12 980 mm (12 650 mm on delivery) |
| Fixed wheelbase: | 1830 mm |
| Total wheelbase: | 4710 mm |
| Empty mass: | 32.8 - 34 t |
| Service mass with tender: | 43.7 - 46.3 t |
| Friction mass: | 14.2 t |
| Top speed: | 50 km / h |
| Driving wheel diameter: | 1676 mm 1555 mm (2nd boiler) |
| Impeller diameter front: | 930 mm |
| Number of cylinders: | 2 |
| Cylinder diameter: | 381 mm 350 mm (2nd boiler) |
| Piston stroke: | 559 mm |
| Boiler overpressure: | 9 atm. 10 atm. (2nd boiler) |
| Number of heating pipes: | 162 |
| Heating pipe length: | 3645 mm |
| Grate area: | 1.1 m² |
| Radiant heating surface: | 6.5 m² |
| Evaporation heating surface: | 83 m² |
| Water supply: | 5.4 - 6.8 m³ |
| Fuel supply: | 2.5 t (coal) |
The Swiss Northeast Railway ( NOB ) procured 16 type B 2/4 steam locomotives with a tender in 1856 . They were purchased for passenger train service. 14 locomotives were obtained from the Maffei locomotive factory in Munich between 1854 and 1862 , two locomotives were replicated by Escher & Wyss in Zurich. The purchase price was between 59 148 and 60 844 Swiss Francs.
Technical
It was an American locomotive built according to Norris principles . At the same time as this express train locomotive, the NOB also procured goods train ( D 2/4 ) and express train locomotives ( A 2/4 ) of a similar design from the same manufacturer, which differ primarily in the wheel diameter.
The locomotives had an outer frame with an external drive. The frame was designed as a double sheet metal frame and was reinforced with plates on the axle holder forks. The bumper beam as well as the cylinders and drawbar struts were used as cross stiffeners. He also had a cross plate, which was also used as a boiler carrier. The two angle iron connections for the bogie additionally stiffened the frame. The fire box was located between the coupling axle. The drive axles were sprung on both sides with two leaf springs each over the frame. The middle ends of the spring were connected in the middle by a compensation lever. The bogie had a double-walled inner frame that was stiffened with a wrought-iron cross. The pivot was moved 75 mm forwards from the center of the bogie. The axles were suspended on each side by an inverted leaf spring, the ends of which rested on the axle bearings.
The drive rod engages the first coupling axle and the coupling rods are on the outside. The large eccentric of the Stephenson control is attached to the neck of the drive axle crank and is therefore within the drive rod. The boiler was topped up with water via a drive pump that was driven by the control's backward eccentric. The cylinders were fastened horizontally on the outside of the frame and were located in front of the first barrel axis. The piston rods were not passed forward.
The three-axle tender had a double outer frame. The suspension springs were between the frame plates and had no balance. The braking device consisted only of a manual spindle brake that acted on the tender axles. There was no steam or counter pressure brake and no block brake on the locomotive.
12 locomotives received a second boiler, this was a Maey boiler. The dimensions of the kettle remained similar, but the pressure could reach 10 atm. can be increased. Due to the increase in pressure, the cylinder diameter was reduced to 350 mm, as otherwise the machines would have tended to spin more often. For this purpose, the drive wheel diameter was reduced to 1555 mm. The structure of the tender was also renewed, it now held 6.5 m³ of water and 3 tons of coal. A total of 8 locomotives were additionally converted and given a weather protection roof.
The two locomotives 98 and 99 were retrofitted with steam heating for passenger trains.
Between 1857 and 1861 5 locomotives were set up to fire peat. For this purpose, a structure was attached to the tender to increase the fuel supply.
| Series from 1864 |
NOB until 1879 |
NOB 1879-1895 |
NOB 1895-1902 |
Surname | Factory number |
Construction year | Manufacturer | 2nd boiler | modification | Discarded |
|---|---|---|---|---|---|---|---|---|---|---|
| BI 1 | 5 | 51 | - | Toess | 173 | 1854 | Maffei | 1874 | 1874 | 1889 |
| BI 1 | 6th | 52 | - | Thur | 174 | 1854 | Maffei | - | - | 1886 |
| BI 1 | 7th | 53 | - | Zurich | 175 | 1854 | Maffei | - | - | 1886 |
| BI 1 | 8th | 54 | - | Winterthur | 176 | 1854 | Maffei | 1972 | - | 1886 |
| BI 1 | 9 | 55 | - | Frauenfeld | 177 | 1854 | Maffei | - | - | 1887 |
| BI 1 | 10 | 56 | - | Romanshorn | 178 | 1854 | Maffei | 1873 | 1873 | 1893 |
| B II 1 | 13 | 57 | - | to bathe | 243 | 1856 | Maffei | 1876 | 1876 | 1890 |
| B II 1 | 14th | 58 | - | Aarau | 244 | 1856 | Maffei | 1871 | - | 1887 |
| B III 1 | 19th | 59 | - | Helvetia | 1 | 1856 | Escher, Wyss | 1875 | 1875 | 1889 |
| B III 1 | 20th | 60 | - | Uto | 2 | 1856 | Escher, Wyss | 1874 | 1874 | 1893 |
| BV 1 | 23 | 61 | - | Wildegg | 280 | 1857 | Maffei | 1874 | 1874 | 1893 |
| BV 1 | 24 | 62 | - | Vindonissa | 281 | 1857 | Maffei | 1871 | - | 1889 |
| BV 1 | 27 | 63 | - | Drive | 282 | 1857 | Maffei | 1876 | 1876 | 1888 |
| BV 1 | 28 | 64 | - | Schinznach | 283 | 1857 | Maffei | - | - | 1885 |
| B VI 1 | 32 | 65 | 98 | Lenzburg | 420 | 1861 | Maffei | 1881 | 1881 | 1903 |
| B VI 1 | 33 | 66 | 99 | Waltshut | 421 | 1862 | Maffei | 1887 | - | 1902 |
1 Until 1887 only B
Operational
With their 350 hp, the locomotives were rather inefficient and were mainly used in light services. No locomotive of this type was taken over from the SBB, but the last two were scrapped shortly before or during the nationalization in 1902/03.
literature
- Alfred Moser: The steam operation of the Swiss railways 1847-1966 . 4th updated edition, Birkhäuser, Stuttgart 1967, pp. 73ff