SL79
SL79 is a class of 40 articulated trams operated by the Oslo Tramway of Norway. The trams were a variation of the Duewag trams that had been developed by the German manufacturer since the 1950s. The six-axle vehicles are unidirectional with four doors on the right side. The trams can seat 77 passengers three and four abreast, with an additional 91 people able to stand. Power output is 434 kilowatts (582 hp), provided by two motors on the two end bogies, that supplement a central unpowered Jacobs bogie located under the articulation. The trams are 23.0 metres (75.5 ft) long and 2.5 metres (8 ft 2 in) wide. They are capable of 80 kilometres per hour (50 mph) and have standard gauge.
| SL79 | |
|---|---|
| In service | 1982–present |
| Manufacturer | |
| Built at | |
| Replaced | Gullfisk |
| Constructed | 1982–1990 |
| Number built | 40 |
| Number in service | 39 |
| Number scrapped | 1 |
| Fleet numbers | 101–140 |
| Capacity | 137 |
| Operators | Sporveien Trikken |
| Depots | Grefsen, Holtet |
| Lines served | 11, 12 |
| Specifications | |
| Car body construction | Steel |
| Car length | 22.4 m (73 ft 6 in) |
| Width | 2.5 m (8 ft 2 in) |
| Height | 3,411 mm (11 ft 2.3 in) |
| Floor height | 880 mm (35 in) |
| Entry | 3-step stairs |
| Doors | 4 |
| Wheel diameter | 680 mm (27 in) |
| Maximum speed | 80 km/h (50 mph) |
| Weight | 32.8 t (32.3 long tons; 36.2 short tons) |
| Traction system | Thyristor chopper control |
| Traction motors | 2 × NEBB 4ELO 2054B 217 kW (291 hp) |
| Power output | 434 kW (582 hp) |
| Acceleration | 1.3 m/s2 (4.3 ft/s2) |
| Deceleration | 1.3 m/s2 (4.3 ft/s2) |
| Electric system(s) | 750 V DC overhead catenary |
| Current collector(s) | Pantograph |
| UIC classification | B′+2′+B′ |
| Braking system(s) | Regenerative and disc brakes |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
They were built in two series, the first of 25 units delivered in 1982–84, and the second of 15 units delivered in 1989–90. The first 10 units were built by Duewag, while the last 30 were built in Norway by Strømmen. They were numbered 101 through 140. The two series vary slightly in specifications. The trams were ordered in 1979 after the 1977 decision to not close the tramway, after the SM53 were finished delivered in 1958. The SL79 mainly serves on lines 11, 12 and 19. However, during rush hour, SL79 trams supplement SL95s on line 13. Except those with an advertising livery, the trams are painted a light blue.
The SL79 trams, along with the flawed SL95 trams is currently being replaced by SL18 trams between 2020 and 2024.