Lokalbahn AG No. 17 to 49
German Reichsbahn class 9873-74
Between 1890 and 1897, the LAG received 13 compound 2-6-0T tank locomotives from Krauss. They received numbers between 17 and 49. Four of these went to the LAG's subsidiary Lausitzer Eisenbahn-Gesellschaft (LEG) in today's Poland. For better guidance on secondary lines, they had a Krauss-Helmholtz bogie that combined the leading and the first driving axle. Aside from these, two simple locomotives were built which were numbered 27 and 28 and were otherwise similar. Additionally, two heavier compound locomotives were built in 1900 which were numbered 59 and 60.
In 1903, No. 18 was rebuilt with the Schmidt smoke tube superheater and tested with very good results, but remained the only one. In 1917, two of 13 locomotives were sold to the BASF. When the LAG was nationalized and integrated into the Reichsbahn in 1938, the Bavarian locomotives became class 9873, while the locomotives of the LEG became class 9874. From the eleven Reichsbahn locomotives, the ten remaining ones came to the Bundesbahn after World War II. They were retired between 1946 and 1950.
Technical data
General
| Property | 17-20 | 23-25, 40, 41, 44, 47-49 |
|---|---|---|
| Built | 1890-1897 | |
| Manufacturers | Krauss | |
| Wheel arrangement | 2-6-0T (Mogul) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | 17-20 | 23-25, 40, 41, 44, 47-49 |
|---|---|---|
| Length | 8.09 m | |
| Wheelbase | 4.80 m | |
| Service mass | 35 t | |
| Adhesion mass | 27 t | |
| Rigid wheelbase | 2.70 m | |
| Axle load | 9.1 t | |
| Water capacity | 4,000 l | |
| Fuel capacity | 1.7 t (coal) | |
Boiler
| Property | 17-20 | 23-25, 40, 41, 44, 47-49 |
|---|---|---|
| Grate area | 1.7 m² | |
| Firebox surface | 5.83 m² | |
| Tube heating surface | 60.37 m² | |
| Evaporative heating surface | 66.2 m² | |
| Total heating surface | 66.2 m² | |
Power plant
| Property | 17-20 | 23-25, 40, 41, 44, 47-49 |
|---|---|---|
| Driver diameter | 1,090 mm | |
| Boiler pressure | 12 bar | 14 bar |
| Expansion type | compound | |
| Cylinders | two, HP: 360 x 500 mm and LP: 550 x 500 mm | |
Power
| Property | 17-20 | 23-25, 40, 41, 44, 47-49 |
|---|---|---|
| Power source | steam | |
| Indicated power | 184 kW (250 PS) | |
| Top speed | 45 km/h | |
| Starting effort | 42.4 kN | 49.5 kN |
| Starting effort simple | 50.9 kN | 59.4 kN |
| Estimated power | 200 kW (272 PS) | |
Calculated values
| Property | 17-20 | 23-25, 40, 41, 44, 47-49 |
|---|---|---|
| Factor of adhesion | 1 : 6.24 | 1 : 5.35 |
| Optimal speed | 26 km/h | 24 km/h |
| Power-to-weight ratio | 5.3 kW/t | 5.7 kW/t |
| Heating Surface Equivalent | 95.4 m² | |
| Cylinder volume/HSE | 1 : 1,156.68 | |
| Adhesive weight/Total | 1 : 1.30 | |
| Tractive force/Heating surface | 1 : 13.39 | 1 : 15.63 |
| Grate area/Heating surface | 1 : 38.94 | |
| Firebox/Tube surface | 1 : 10.36 | |