Bavarian DX
| DX (Bavaria) DR series 98 77 |
|
|---|---|
| Numbering: | DR 98 7701-7709 |
| Number: | 9 |
| Manufacturer: | Krauss |
| Year of construction (s): | 1890, 1893 |
| Retirement: | 1931 |
| Type : | C1 'n2t |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 9,310 mm |
| Service mass: | 42.7 t |
| Friction mass: | 33.0 t |
| Wheel set mass : | 11.0 t |
| Top speed: | 45 km / h |
| Indexed performance : | 220 kW |
| Driving wheel diameter: | 985 mm / 1,006 mm |
| Rear wheel diameter: | 780 mm / 800 mm |
| Number of cylinders: | 2 |
| Cylinder diameter: | 390 mm |
| Piston stroke: | 508 mm |
| Boiler overpressure: | 12 bar |
| Grate area: | 1.40 m² |
| Evaporation heating surface: | 71.71 m² |
| Locomotive brake: | Hardy suction air brake, later compressed air brake |
The class D X locomotives were wet steam locomotives of the Royal Bavarian State Railways .
The locomotives built by Krauss were similar to type D VIII , but were somewhat smaller and lighter. Like the D VIII, they had a trailing axle that was connected to the last coupling axle to form a Krauss-Helmholtz steering rack .
history
For the Passau – Freyung railway line, which opened in 1890/1892, the Bavarian State Railroad needed new, powerful locomotives because the existing D VII locomotives were too weak. A machine with a maximum axle load of 11.5 tonnes was designed on the basis of the D VIII. In 1890 six, and in 1893 another three, were built with slightly larger wheels. The first machine was only 8,880 mm long due to the lack of a coal box on the driver's cab. The locomotives were used exclusively on the routes around Passau (Passau-Freyung, Waldkirchen-Haidmühle , Passau-Neumarkt-Sankt Veit , Vilshofen-Aidenbach and Vilshofen-Ortenburg ) and on the Zwiesel-Grafenau railway line .
All vehicles were taken over by the Deutsche Reichsbahn as class 98 77 in 1925 and were in service until 1931. Only the company numbers 98 7706 and 98 7707 were retired shortly after the redesignation.
Individual evidence
- ↑ a b c Horst J. Obermayer: Steam locomotives standard gauge . Weltbild, Augsburg 1995, ISBN 3-89350-819-8 , p. 263 (first edition: Franckh-Kosmos, Stuttgart 1990).