| Bavarian PtzL 3/4 DRG Class 97.1 |
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| Number(s): | 4101–4103 + 8033 DRG 97 101–104 in Passau shed |
| Quantity: | 4 |
| Manufacturer: | Krauss |
| Year(s) of manufacture: | 29.07/ 30.08 and 17 September 1912, 1923 |
| Retired: | 1963 |
| Wheel arrangement: | 0-6-2 |
| Axle arrangement: | C1' h2(4v) |
| Type: | Ptzl |
| Gauge: | 1,435mm |
| Length over buffers: | 10,490 mm |
| Service weight: | 57.8 t |
| Adhesive weight: | 46.2 t |
| Axle load: | 15.6 t |
| Top speed: | 45km/h adhesive, 12km/h cogwheel |
| Indicated Power: | 390 kW/ 530PSi adhesive, 560PSi cogwheel |
| Driving wheel diameter: | 1,006 mm |
| Trailing wheel diameter: | 800 mm |
| Rack system: | Emil Strub |
| No. of cylinders: | 2 |
| Cylinder bore: | 508 mm |
| Piston stroke: | 460 mm |
| Boiler Overpressure: | 12 bar |
| Grate area: | 1.85 m² |
| Superheater area: | 25.40 m² |
| Evaporative heating area: | 71.69 m² |
| Fuel: | coal |
| Drive: | superheated steam, 2 cylinders in adhesive working, 4 cylinders in cogwheel mode |
| Couplers: | Standard buffers with coupling hooks |
The Bavarian Class PtzL 3/4 engines with the Royal Bavarian State Railways (Königlich Bayerische Staats-Eisenbahnen) were rack railway locomotives whose cogwheel drive was designed for working on tracks with a Strub rack. In 1923 they were incorporated by the Deutsche Reichsbahn as DRG Class 97.1 (Baureihe 97.1) in their numbering plan. The locomotives remained on their regular route between Erlau and Wegscheid until the closure of this rack railway in 1963. The last journey was on 5 January 1963. They were scrapped in April 1964 at Simbach am Inn.
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