| Palatine P 5 DRG Class 77.0 |
Palatine Pt 3/6 Bavarian Pt 3/6 DRG Class 77.1 |
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|---|---|---|
| Number(s): | Palatinate: 310 - 321 DRG 77 001–012 |
Palatinate: 330 - 338, 401-410 Bavaria: 6101 - 6110 DRG 77 101–129 |
| Quantity: | 12 | 29 |
| Manufacturer: | Krauss | |
| Years of Manufacture: | 1908 | 1911–1923 |
| Retired: | 1951 | 1956 |
| Wheel arrangement (Whyte): | 2-6-4T | |
| Axle arrangement (UIC): | 1'C2' n2t 1925 Conversion to superheating |
1'C2' h2t |
| Sub-class: | Pt 36.16 | |
| Length over buffers: | 13,140 mm | 13,460 mm |
| Gauge: | 1,435 mm | |
| Service weight: | 92.9 t | 91.1–94.8 t |
| Adhesive weight: | 50,0 t | 48.3–48.8 t t |
| Axle load: | 16,7 t | 16,1–16,3 t |
| Top speed: | 90 km/h | |
| Indicated power: | 633 kW | |
| Driving wheel diameter: | 1,500 mm | |
| Leading wheel diameter: | 960 mm | |
| Trailing wheel diameter: | 960 mm | |
| No. of cylinders: | 2 | |
| Cylinder bore: | 530 mm | |
| Piston stroke: | 560 mm | |
| Boiler overpressure: | 13 bar | |
| Grate area: | 2.34 m³ | |
| Superheater area: | 35.00 m² | |
| Evaporative heating area: | 109.94 m² | 110.94 m² |
The six-coupled P 5 of the Palatinate Railway (Pfalzbahn) was to replace the four-coupled locomotives in the Palatinate. They were given a leading Krauss-Helmholtz bogie and a trailing bogie in order to achieve satisfactory weight distribution.
The firm of Krauss delivered twelve examples in 1908. One notable feature was the particularly large coal and water tanks requested by the Railway. The Deutsche Reichsbahn took all the vehicles over and converted them to superheated engines. After the end of the Second World War nine were left. Most of them were sold to private railways. The last one owned by the Deutsche Bundesbahn was retired in 1951.
After the Palatine P 5 had proved successful, the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn) decided to procure more of this class in a more powerful version. As a result the Palatine Pt 3/6 was built from 1911. A total of 19 engines were procured. In 1923 a further 10 of these two-cylinder superheated steam engines were ordered for Bavaria as the Bavarian Pt 3/6. They were deployed on the express train routes between Garmisch-Partenkirchen and Munich. All the engines were taken over by the Reichsbahn, the Bavarian versions being given the operating numbers 77 110–119. One machine was lost during the Second World War. The Deutsche Bundesbahn took over 27 engines and retired them by 1954. One locomotive remained with the East German DR and was retired in 1956.
Horst J. Obermayer: Taschenbuch Deutsche Dampflokomotiven.Regelspur. 2. Auflage, Franckh'sche Verlagshandlung, Stuttgart 1971, ISBN 3-440-03643-X
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