Belgian Railways Class 77

Last updated
SNCB/NMBS 77
Loc7798 R01 alt.jpg
Diesel locomotive #7798 of the Belgian State Railways (SNCB – NMBS), 2010
Type and origin
Power typeDiesel
Builder Vossloh Schienentechnik/Vossloh Locomotives
Serial number1000918 – 1001007 [1]
1001217 – 1001296 [1]
Build date1999–2005 [1]
Total produced170 [1]
Specifications
Configuration:
​
 •  UIC B'B' [1]
Gauge 1,435 mm (4 ft 8+1⁄2 in) standard gauge [1]
Wheel diameter1,000 mm (39.37 in) (new) [1]
Minimum curve 75 m (246.06 ft) [1]
Wheelbase bogie centre distance 7.770 m (25 ft 5.9 in) [2]
axle distance 2.400 m (7 ft 10.5 in) [2]
Length15.590 m (51 ft 1+3⁄4 in) [1]
Width3.052 m (10 ft 1⁄8 in) [1]
Height4.220 m (13 ft 10+1⁄8 in) [1]
Loco weight90 t
(88.6 long tons; 99.2 short tons) [1]
Fuel capacity4,200 L
(920 imp gal; 1,100 US gal) [1]
Prime mover Anglo Belgian Corporation 6DZC-1000-144A [1]
Alternator Auxiliary 3 phase 65–130 kW [3]
Transmission Voith Hydraulic L4r4zseU2a [2]
Loco brake pneumatic (Knorr-Bremse) [3]
Performance figures
Maximum speed100 or 60 km/h (62 or 37 mph) [1] [2]
Power output1,150 kW (1,540 hp) [1]
Tractive effort 210–265 kN (47,000–60,000 lbf) [1]
Career
Operators SNCB/NMBS
Class 77
Numbers7701–7870 [1]
Dispositionin service

The NMBS/SNCB Class 77 (also known as HLD 77 or HLR 77) is a class of 4 axle B'B' road switcher diesel hydraulic locomotive designed for shunting and freight work manufactured at the beginning of the 2000s by Vossloh Schienentechnik/Vossloh Locomotives at the Maschinenbau Kiel plant in Kiel, Germany for the National Railway Company of Belgium (SNCB/NMBS).

Contents

Background and design

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. [4] Siemens sold its locomotive manufacturer division (Siemens Schienenfahrzeugtechnik) to Vossloh in 1998. [5]

The locomotives were variants of the standard MaK G 1200 series design, [2] and are considered a development of the MaK G 1205 type. [1] The locomotive is an off-centre cab design with a two-speed Voith hydraulic transmission driving all axles via cardan shafts. [2] Auxiliary electrical supply is provided by an engine mounted alternator. [4] Unlike many other MaK locomotives which use a MTU or CAT 12-cylinder V engine the locomotive has an ABC 6-cylinder inline engine. [3]

The first locomotive was delivered in October 1999, and worked satisfactorily; a second order for 80 locomotives was given in June 2001. [4] [6]

Operations

The first locomotive entered service in February 2004. [7] All 170 units were operational by June 2005. [8]

Due to its relatively low power the locomotives work in multiple on heavy freight trains.

Equipment variations

Sets of the class vary in the type of equipment they carry: [4]

NMBS/SNCB
number		Radio
control		Cab
Radio		 ATB Notes
7701–7708YesYesNoFitted with automatic coupler for hill shunting; not approved for Netherlands
7709–7728Approved for limited operations in Netherlands [6]
7729–7770No
7771–7790YesApproved for Netherlands [9] and Germany (2004); [10] fitted with PZB system
7791–7865NoNoCan operate in Netherlands when in multiple with locos with ATB or radio [9]
7866–7870~YesFitted with ATB and PZB in 2008 for work in Germany (Iron Rhine line) [11]

See also

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References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 "MaK – HLD 77 für die SNCB". www.loks-aus-kiel.de (in German). Archived from the original on 2007-09-27. Retrieved 2007-08-20.
  2. 1 2 3 4 5 6 "HLD 77 diesel-hydraulic, multi-purpose locomotive for SNCB (Belgian Railways) equipped with Voith L 4r4 zseU2a turbo reversing transmission" (PDF). www.voithturbo.com. Voith.
  3. 1 2 3 David De Neef (editor). "Locomotives des séries 77 et 78". www.belrail (in French). Fiche technique.{{cite web}}: |author= has generic name (help)
  4. 1 2 3 4 David De Neef (editor). "Locomotives des séries 77 et 78". www.belrail.be (in French).{{cite web}}: |author= has generic name (help)
  5. ↑ "Historie". Vossloh (in German). Archived from the original on 2008-12-21.
  6. 1 2 "Nieuwsbrief Issue 48". www.netherlandsrailways.co.uk. Benelux Railways Society. March 2004. Class 77. Archived from the original on 2009-02-07.
  7. ↑ David De Neef (ed.). "Les premières 77 en service commercial". www.belrail.be (in French).
  8. ↑ David De Neef (ed.). "L'ensemble de la série 77/78 opérationnelle". www.berail.be (in French).
  9. 1 2 David De Neef (ed.). "Les 77/78 homologuées aux Pays-Bas". www.belrail.be (in French).
  10. ↑ David De Neef (ed.). "Les 77 homologuées en Allemagne". www.belrail.be (in French).
  11. ↑ David De Neef (ed.). "Cinq motrices supplémentaires pour circuler sur le Rhin d'acier". www.belrail.be (in French).
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