BDŽ series 600.76

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BDŽ series 600.76
Recording of the 609.76
numbering BD®: 601.76-605.76 BD®: 606.76-615.76
Manufacturer BMAG Fablok , Chrzanów
Years of construction 1940 1949
Retirement 1977
number 5 10
Gauge 760 mm
Top speed 45 km / h
Starting tractive effort 119 kN
Length over buffers 11,260 mm
height 3,510 mm
Empty mass 46.8 t
Service mass 62 t
Friction mass 50 t
Axle load 10 t
control Heusinger
design type 1'E1 'h2t
Number of cylinders 2
Cylinder diameter 460 mm
Piston stroke 400 mm
Boiler pressure 16 bar
Grate surface 2 m²
Superheater surface 32.6 m²
Evaporation heating surface 87.6 m²
indicated performance 625 kW (850 hp)
Driving wheel diameter 850 mm
Impeller diameter 550 mm
Total wheelbase 8,000 mm
fixed wheelbase 4,200 mm
smallest traveled radius 50 m
Water supply 7 m 3
Coal supply 4 t

The BDŽ series 600.76 are steam locomotives of the Bulgarian state railway Balgarski Darschawni Schelesnizi (BDŽ), which were preferably built for operation on the Rhodope Railway by the companies BMAG and Fablok , Chrzanów and after being replaced on the line for a few years on the narrow-gauge railway in Červen Brjag was used. The locomotives emerged from the DR class 99.73-76 and were considered the largest steam locomotives in Bosnian gauge in Bulgaria. A locomotive has been preserved in the Septemwri depot of the Rhodope Railway as a running museum locomotive.

history

Photo of 615.76 as a memorial in Sofia

For operation on the Rhodope Railway, which runs as a demanding mountain railway from Septemwri between the Rila and Rhodope Mountains to the eastern part of the Pirin Mountains , the Bulgarian state railway BDŽ needed powerful narrow-gauge locomotives. These should be able to move heavy trains on gradients of 30 ‰ and at the same time to negotiate a minimum curve radius of 60 m. The solution came with the former sä, which was first procured in 1928. VIIk, some details of which were constructively modified for use in Bulgaria.

In 1941 a slightly enlarged VIIk was delivered to Bulgaria. Due to war reasons, only five locomotives could be delivered from Germany. Therefore, ten more locomotives were delivered by Fablok , Chrzanów in 1949 , the technical data of which were almost identical to the pre-war locomotives , but had a few changes in appearance. The locomotives from Chrzanów had the typical smoke deflectors from Polish steam locomotives, while the Polish locomotives had two instead of four domes and a dome cladding.

The newly delivered locomotives were able to move a load of 160 t over the slopes of the Rhodope Mountains at a maximum speed of 45 km / h. Since the loads showed constantly higher values, freight trains were mostly hauled by two locomotives in order to travel the section to the highest point of the route Avramowo at 1,267 m above sea level . In the opposite direction, there was a turntable for the locomotives used by the Bansko depot in Jakoruda to ensure that the locomotives always ran with the smoke chamber in the direction of the mountain in the following uphill section to the apex .

The locomotives mainly took over the freight traffic on this route, on the one hand to supply the industrial companies or to transport wood and minerals from the mountains. Passenger traffic was carried out primarily by railcars . The locomotives proved their worth on the demanding mountain route, where they could use their great tractive power. Initially, the locomotives were located exclusively in Septemwri. They carried out this service until the mid-1960s, when they were replaced by the universally applicable 75 series. Now all 15 locomotives have been moved to the narrow-gauge railway to Orjachowo , where the locomotives made all older machines on the route to Červen Brjag superfluous. On this line they handled almost all freight and passenger traffic with minor inclines, only supported by a few railcars. Since they had to constantly drive at full speed, engine and bearing damage occurred after a short time. In 1976 the traction was changed with new class 76 locomotives . Until the winter of 1984/85, heating services were still carried out in Červen Brjag with the 605.76 locomotive , the last Bulgarian VIIk locomotive made in Germany.

An unknown number was kept as a strategic reserve in Septemwri, Červen Brjag and Bansko , but the majority were scrapped. After 2000 the 609.76 was rebuilt as a running museum locomotive, so that in 2011 the following locomotives were available:

  • 609.76 working condition
  • 610.76 turned off
  • 611.76 parked
  • 613.76 parked.

On the grounds of the University of Transport in Sofia which was 615.76 set up as a memorial. In 2014 one of the three parked machines was designated as a reserve for the drivable machine. The 613.76 was intended for this. The other locomotives were still parked rusty. In 2016, no decision was made about the reconditioning of the locomotive.

technical description

The structure of the locomotives corresponded to the DR series 99.73-76 and only a few details were changed for the special use in Bulgaria. They were designed to be a little more efficient, with the grate surface, evaporation heating surface, superheater surface and boiler pressure increased. The result was a slightly heavier machine compared to the original form. The main difference was the diameter of the coupling wheels, which allowed the top speed to be increased to 45 km / h. In addition, the Bulgarian locomotives had panels between the boiler and the engine. For use in wooded areas, all locomotives had a filter to avoid excessive flying sparks and a snow plow. No changes were necessary in the construction of the carriage, the minimum curve radius of the Rhodope Railway was 60 m. The locomotives were coupled with the so-called Bosnia coupling .

See also

Web links

Commons : BDŽ series 600.76  - collection of pictures, videos and audio files
Commons : Photos of parked steam locomotives in the Bansko depot  - collection of images, videos and audio files

literature

  • Paul Engelbert: Narrow gauge through Bulgaria , Stenvalls Verlag Trelleborg, 2002, ISBN 91-7266-155-0
  • Dimiter Dejanow: The 760 mm narrow-gauge railway Septemvri-Dobrinischte in Der Modelleisenbahner 3/1980, page 74

Individual evidence

  1. ↑ a b c d e Paul Engelbert: Schmalspurig durch Bulgarien , Stenvalls Verlag Trelleborg, 2002, ISBN 91-7266-155-0 , page 89
  2. ↑ a b c Internet page about the locomotives 600.76 on www.bimmelbahn.de
  3. ↑ photo of the operational museum locomotive 609.76 2009 Septemvri
  4. ^ Internet site from the Bimmelbahn-Forum about the locomotives of the Rhodope Railway
  5. ↑ Internet site about a situation report in Septemvri on Lok-Report
  6. ^ Photo of the front section of a Polish locomotive