Belgian Railways Class 77
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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).
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 |
---|---|---|---|---|
7701–7708 | Yes | Yes | No | Fitted with automatic coupler for hill shunting; not approved for Netherlands |
7709–7728 | Approved for limited operations in Netherlands[6] | |||
7729–7770 | No | |||
7771–7790 | Yes | Approved for Netherlands[9] and Germany (2004);[10] fitted with PZB system | ||
7791–7865 | No | No | Can operate in Netherlands when in multiple with locos with ATB or radio[9] | |
7866–7870 | ~ | Yes | Fitted with ATB and PZB in 2008 for work in Germany (Iron Rhine line)[11] |
See also
- NS Class 6400 similar concept diesel electric freight locomotives built by MaK/Siemens between 1988 and 1995 for the railways of the Netherlands.
References
- ^ a b c d e f g h i j k l m n o p q r s "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.
- ^ a b c d e f "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.
- ^ a b c David De Neef (editor). "Locomotives des séries 77 et 78". www.belrail (in French). Fiche technique.
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has generic name (help) - ^ a b c d David De Neef (editor). "Locomotives des séries 77 et 78". www.belrail.be (in French).
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has generic name (help) - ^ "Historie". Vossloh (in German). Archived from the original on 2008-12-21.
- ^ a b "Nieuwsbrief Issue 48". www.netherlandsrailways.co.uk. Benelux Railways Society. March 2004. Class 77. Archived from the original on 2009-02-07.
- ^ David De Neef (ed.). "Les premières 77 en service commercial". www.belrail.be (in French).
- ^ David De Neef (ed.). "L'ensemble de la série 77/78 opérationnelle". www.berail.be (in French).
- ^ a b David De Neef (ed.). "Les 77/78 homologuées aux Pays-Bas". www.belrail.be (in French).
- ^ David De Neef (ed.). "Les 77 homologuées en Allemagne". www.belrail.be (in French).
- ^ David De Neef (ed.). "Cinq motrices supplémentaires pour circuler sur le Rhin d'acier". www.belrail.be (in French).
External links
- Images: SNCB série 77, www.rail.lu
- Images: Belgian freight diesel class 77, www.railfaneurope.net