SiTB De 3/3
| De 3/3 | |
|---|---|
| Numbering: | 1 |
| Number: | 1 |
| Manufacturer: | SIG MFO |
| Year of construction (s): | 1925 |
| Retirement: | 1930, conversion to De 3/4 |
| Axis formula : | Co |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 9.1 m |
| Total wheelbase: | 4.5 m |
| Top speed: | 50 km / h |
| Continuous output : | 666 hp |
| Hourly traction: | 6600 kg / 4400 kg |
| Driving wheel diameter: | 1040 mm |
| Power system : | 15 kV, 16.7 Hz |
| Power transmission: | Pantograph |
| Number of traction motors: | 3 |
| De 3/4 | |
|---|---|
| Numbering: | 2/41 |
| Number: | 1 |
| Manufacturer: | MFO |
| Year of construction (s): | 1931, conversion from De 3/4 |
| Retirement: | 2001 |
| Axis formula : | Bo '(1Ao) |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 12.0 m |
| Height: | 4.5 m (pantograph lowered) |
| Width: | 3 m |
| Trunnion Distance: | 6.31 m |
| Bogie axle base: | 2.4 m |
| Total wheelbase: | 8.71 m |
| Service mass: | 48 t |
| Continuous output : | 430 kW (666 hp) |
| Hourly traction: | (6600 kg / 4400 kg) |
| Driving wheel diameter: | 1040 mm |
| Impeller diameter: | 1040 mm |
| Power system : | 15 kV, 16.7 Hz |
| Power transmission: | Pantograph |
| Number of traction motors: | 3 |
The De 3/3 was the first electric locomotive on the Sihl Valley Railway ( SiTB ). It was purchased in 1925 when the line was electrified and built by the Swiss Industrial Society (SIG) and Maschinenfabrik Oerlikon (MFO). In 1930 it was converted into De 3/4 2 and in 1964 it was given the number 41.
History, technology and modifications
The locomotive was ordered together with the five CFe 2/4 Nos. 81–85 railcars , whereby care was taken to ensure that the same electrical components were installed as far as possible. It had the same transformer and the three traction motors also corresponded to the type of railcar. With the additional motor, it reached an hourly pulling force of 6600 kg instead of 4400 kg. The maximum performance, however, was 18 km / h instead of 27 km / h. A switchover allowed operation with only two engines, whereby the locomotive could then produce the same power as a railcar (4400 kg at 27 km / h). Like the railcars, the paint was dark green.
The locomotive initially had a rigid frame with asymmetrically arranged axles. The running gear was unsuitable for the winding route with sidings that only had a weak superstructure. In addition to the high wear and tear on the rails and wheels, there were also derailments.
For this reason it was decided to convert the locomotive. After the railcar CFe 3/4 No. 90 had been delivered, the locomotive was sent to the MFO in 1930, where it was converted into a bogie locomotive. Because the electrical part was still used, a bogie was given a running axle. This led to the rather unusual axle formula Bo'1Ao 'and the new designation De 3/4 No. 2. The conversion resulted in the expected improvements in the running properties.
Between 1962 and 1964, the locomotive went through another rebuild. After that it was set up for seated operation and could be remotely controlled from the Bt 52-55 control car. It was also painted oxide red and renamed De 3/4 No. 41.
In 1985 it received another overhaul, whereby the oxide red paintwork was replaced by the red SZU coloring with orange stripes that was common at the time.
commitment
Their main areas of application were driving freight trains and shunting tasks. If there was a shortage of railcars, it was also used to transport passenger trains. In the 1970s, the rather poor performance was hardly enough to meet the growing requirements in freight train service, so that from 1974 a BLS Ce 4/4 was first used on a rental basis . With the commissioning of more powerful locomotives, the De 3/4 was replaced in freight traffic. From then on it was only used as a service vehicle and shunting vehicle in Selnau station.
Whereabouts
The locomotive has been parked since January 1, 2001 and became the property of the Zürcher Museums-Bahn (ZMB), where it was given the number 7. The locomotive is currently not operational.
literature
- Hans Waldburger, Hans Tempelmann: The Sihltalbahn. 100 years from the steam train to the modern S-Bahn line. Minirex, Luzern 1992, ISBN 3-907014-06-5 , pp. 82-85.
Web links
- SiTB De 3/3 & De 3/4. In: Archive Arthur Meyer. The digital railway photo archive, accessed on December 16, 2012 (type sketch).
- De 3/3 & De 3/4. In: Archive Arthur Meyer. The digital railway photo archive, accessed on December 16, 2012 (photos and type sketch with masses).
Individual evidence
- ↑ a b list of rolling stock. (PDF; 17 kB) Sihltal-Zürich-Uetliberg-Bahn SZU, accessed on December 16, 2012 .