SNCB Class 77
Diesel locomotive #7798 of the Belgian State Railways (SNCB – NMBS), 2010
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| Type and origin | |
|---|---|
| Power type | Diesel |
| Builder | MaK (Siemens/Vossloh) |
| Serial number | 1000918 – 1001007 1001217 – 1001296 |
| Build date | 1999–2005 |
| Total produced | 170 |
| Specifications | |
|---|---|
| Configuration: |
|
| • UIC | B'B' |
| Gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Wheel diameter | 1,000 mm (39.37 in) (new) |
| Minimum curve | 75 m (246 ft 1 in) |
| Wheelbase |
bogie centre distance 7.770 m (25 ft 5.9 in) axle distance 2.400 m (7 ft 10.5 in) |
| Length | 15.590 m (51 ft 1.8 in) |
| Width | 3.052 m (10 ft 0.2 in) |
| Height | 4.220 m (13 ft 10.1 in) |
| Loco weight | 90 t (89 long tons; 99 short tons) |
| Fuel capacity | 4,200 L (920 imp gal; 1,100 US gal) |
| Prime mover | Anglo Belgian Corporation 6DZC-1000-144A |
| Alternator | Auxiliary 3 phase 65–130 kW |
| Transmission | Voith Hydraulic L4r4zseU2a |
| Loco brake | pneumatic (Knorr-Bremse) |
| Performance figures | |
|---|---|
| Maximum speed | 100 or 60 km/h (62 or 37 mph) |
| Power output | 1150 kW |
| Tractive effort | 210/265 kN |
| Career | |
|---|---|
| Operators | SNCB/NMBS |
| Class | 77 |
| Numbers | 7701–7870 |
| Disposition | in service |
The SNCB Class 77 (also known as HLD 77 or HLR 77) is a class of 4 axle B'B' diesel hydraulic locomotive designed for shunting and freight work manufactured at the beginning of the 2000s by Siemens Schienenfahrzeugtechnik and later by Vossloh at the Maschinenbau Kiel plant in Kiel, Germany for the National Railway Company of Belgium (SNCB/NMBS).
The initial order for 90 locomotives was given to Siemens in 1997 to replace an aging diesel fleet; the railway opted for a locomotive suitable for both shunting and mainline use, rather than separate classes.
The locomotives were variants of the standard MaK G1200 series design, and are considered a development of the MaK G1205 type. The locomotive is an off-centre cab design with a two-speed voith hydraulic transmission driving all axles via cardan shafts. Auxiliary electrical supply is provided by an engine mounted alternator. Unlike many other MaK locomotives which use a MTU or CAT 12-cylinder V engine the locomotive has an ABC 6-cylinder inline engine.
The first locomotive was delivered in October 1999, and worked satisfactorily; a second order for 80 locomotives was given in June 2001.
The first locomotive entered service in February 2004. All 170 units were operational by June 2005.
Due to its relatively low power the locomotives work in multiple on heavy freight trains.
Sets of the class vary in the type of equipment they carry:
...
Wikipedia