BDŽ series 500.76
| BDŽ series 500.76 | |||
|---|---|---|---|
|
|||
| numbering | BD®: 501.76-504.76 | BD®: 505.76-506.76 | |
| Manufacturer | ČKD | BMAG | |
| Years of construction | 1927 | 1931 | |
| Retirement | 1979 | ||
| number | 4th | 2 | |
| Gauge | 760 mm | ||
| Top speed | 30 km / h | ||
| Starting tractive effort | 97 kN | 98 kN | |
| Length over buffers | 9,738 mm | 8,800 mm | |
| height | 3,540 mm | 3,050 mm | |
| smallest traveled radius | 50 m | ||
| Empty mass | 38.8 t | 32.3 t | |
| Service mass | 50 t | 41.5 t | |
| Friction mass | 50 t | 41.5 t | |
| Axle load | 10 t | 8.3 t | |
| control | Heusinger | ||
| design type | E h2t | ||
| Number of cylinders | 2 | ||
| Cylinder diameter | 460 mm | 450 mm | |
| Piston stroke | 400 mm | ||
| Boiler pressure | 13 bar | ||
| Grate surface | 1.83 m² | 1.6 m² | |
| Superheater surface | 39.2 m² | 21.5 m² | |
| Evaporation heating surface | 75.7 m² | 55.7 m² | |
| Driving wheel diameter | 850 mm | 800 mm | |
| Total wheelbase | 4,000 mm | 3,600 mm | |
| fixed wheelbase | 2,000 mm | 3,600 mm | |
| Water supply | 6.1 m 3 | 4.2 m 3 | |
| Coal supply | 2 t | 1.65 t | |
The BDŽ series 500.76 is a steam locomotive of the Bulgarian state railway BDŽ , which was preferably built for operation on the Rhodope Railway by the companies ČKD Prague and BMAG and, after delivery of the BDŽ series 600.76, was mainly used in freight train service on the narrow-gauge line from Červen Brjag . The locomotives differ significantly in their performance parameters between the individual delivery companies, but they have been grouped into one series. Three vehicles of the locomotives have been preserved. A machine is to be rebuilt as a drivable exhibit.
history
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 BDŽ series No. 1.76 to 10.76 locomotives that were initially used were soon too weak to operate to be able to cope with numerous gradients to Avramowo in the long run. Therefore, in the summer of 1928, four locomotives with the E-wheel arrangement were ordered and delivered from ČKD Prague especially for this route. With these five-way coupled locomotives, the steep gradients could be mastered better.
The locomotives proved to be extremely powerful and robust. In terms of technical data, they were more powerful than the Saxon VI K , they had a larger grate surface , evaporation heating surface and superheater heating surface . This explains their service weight of 50 t and the relatively high axle load of 10 t.
With these locomotives, effective traffic on the mountain railway could be carried out. In the same year two more locomotives with the same wheel arrangement were delivered by BMAG, which were somewhat smaller and less powerful than the locomotives from ČKD and the Saxon VI K. Although the two locomotives showed major differences, they were classified in the same series. The locomotives had a relatively low speed of 30 km / h, which is why the order was made for the BDŽ series 600.76 with an even greater output and a top speed of 45 km / h.
Initially, all class 500.76 locomotives were based in Septemwri and provided freight train service to the mountains. In Avramowo, the apex of the Rhodope Railway, there was a triangular track and in Jakoruda there was a turntable that is still in place today , so that the locomotives for the ramp travel on the steep sections constantly ran with the smoke chamber first against the mountain. The northern section of the route to Avramowo was driven by personnel from the Septemwri depot, the southern section by personnel from the Bansko depot . The schedule was designed so that two trains crossed in Avramowo station, where the locomotives of the respective depots were swapped.
From 1942, all locomotives except the last 506.76 delivered were moved to the narrow-gauge railway to Červen Brjag, where they were used in freight train service due to their high performance and speed of 30 km / h. Here the locomotives replaced the BDŽ No. 1.76 to 10.76 locomotives that had become too weak for service. Although the gradients on this route were not as significant as on the Rhodope Railway, the increased freight volume made stronger locomotives necessary.
The locomotives ran here until the early 1970s, when they were replaced by 600.76 series locomotives that had become vacant from the Rhodope Railway . Locomotive 503.76 , which was not retired until 1949 in Červen Brjag and was then erected as a memorial in the same place, stayed here the longest . The 504.76 was returned to Septemwri as a strategic reserve after it was taken out of service and is now a museum locomotive in Bansko.
The last locomotive built in the series, the 506.76 , which never left Septemwri, ended up in the Ruse Railway Museum in 1966 . The locomotive was parked there until after 2002, after which it was brought back to Septemwri and the exterior is to be refurbished.
technical description
The locomotives of CKD can be used as a reduced version of the ČSD series 423.0 are considered
See also
Web links
- Website about the narrow-gauge locomotives in Bulgaria on pospichal
- Travel report from the Rhodope Railway in the Bimmelbahn-Forum from 2014 with mention of the BDZ series 506.76
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
- ↑ Paul Engelbert: Narrow gauge through Bulgaria , Stenvalls Verlag Trelleborg, 2002, ISBN 91-7266-155-0 , page 77
- ^ A b Paul Engelbert: Schmalspurig durch Bulgarien , Stenvalls Verlag Trelleborg, 2002, ISBN 91-7266-155-0 , page 90
- ↑ Railways of the World: Steam Locomotive 506.76. In: eisenbahnen-der-welt.de. August 27, 2011, accessed on February 10, 2017 (website about the 506.76 locomotive in the Ruse Railway Museum ).
- ↑ photo of the locomotive 506.76 in septemvri
