Palatine P 5

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Palatine P 5 Palatine Pt 3/6 Bavarian Pt 3/6
Bavarian Pt 3/6 No. 6105
Type and origin Power type Steam Builder Lokomotivfabrik Krauss & Comp. Build date P 5: 1908 Pt 3/6: 1911–1923 Total produced P 5: 12 Pt 3/6: 29
Specifications Configuration: ​  • Whyte 2-6-4T  • UIC P 5: 1′C2′ n2t later 1′C2′ h2t Pt 3/6: 1′C2′ h2t  • German Pt 36.16 Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 960 mm (3 ft 1+3⁄4 in) Driver dia. 1,500 mm (4 ft 11 in) Trailing dia. 960 mm (3 ft 1+3⁄4 in) Length: ​  • Over buffers P 5:13,140 mm (43 ft 1+1⁄4 in) Pt 3/6: 13,460 mm (44 ft 2 in) Axle load P 5: 16.7 t (16.4 long tons; 18.4 short tons) Pt 3/6: 16.1–16.3 t (15.8–16.0 long tons; 17.7–18.0 short tons) Adhesive weight P 5: 50.0 t (49.2 long tons; 55.1 short tons) Pt 3/6: 48.3–48.8 t (47.5–48.0 long tons; 53.2–53.8 short tons) Service weight P 5: 92.9 t (91.4 long tons; 102.4 short tons) Pt 3/6: 91.1–94.8 t (89.7–93.3 long tons; 100.4–104.5 short tons) Fuel type Coal Fuel capacity 4.0 t (3.9 long tons; 4.4 short tons) Water cap. 15.3 m3 (3,400 imp gal; 4,000 US gal) Firebox: ​  • Grate area 2.34 m2 (25.2 sq ft) Boiler: ​  • Tube plates 4,000 mm (157+1⁄2 in)  • Small tubes P 5: 45 mm (1+3⁄4 in), 256 off Pt 3/6; 45 mm (1+3⁄4 in), 133 or 135 off  • Large tubes Pt 3/5: 133 mm (5+1⁄4 in), 21 off Boiler pressure 13 bar (13.3 kg/cm2; 189 lbf/in2) Heating surface: ​  • Firebox 10.32 m2 (111.1 sq ft)  • Tubes P 5: 66.92 m2 (720.3 sq ft) Pt 3/6: 67.94 m2 (731.3 sq ft)  • Flues Pt 3/5: 32.70 m2 (352.0 sq ft)  • Total surface P 5: 139.5 m2 (1,502 sq ft) Pt 3/6: 110.94 m2 (1,194.1 sq ft) Superheater: ​  • Heating area 35.00 m2 (376.7 sq ft) Cylinders Two, outside Cylinder size 530 mm × 560 mm (20+7⁄8 in × 22+1⁄16 in)
Performance figures Maximum speed 90 km/h (56 mph) Indicated power 633 kW (861 PS; 849 hp)
Career Numbers P 5: Palatinate: 310–321 DRG 77 001 – 77 012 Pt 3/6: Palatinate: 330–338, 401–410 Bavaria: 6101–6110 DRG 77 101 – 77 129 Retired P 5: 1951 Pt 3/6: 1956

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.

• Royal Bavarian State Railways
• Palatinate Railway
• List of Bavarian locomotives and railbuses
• List of Palatine locomotives and railbuses

• Emich/Becker (1996), Die Eisenbahnen an Glan und Lauter (in German), Waldmohr: Selbstverlag, ISBN 3-9804919-0-0
• Lothar Spielhoff (2011), Lokomotiven der Pfälzischen Eisenbahn (in German), Germering: Jürgen Pepke, ISBN 978-3-940798-15-2
• Manfred Weisbrod, Hans Müller, Wolfgang Petznick: Dampflokomotiven 3. Baureihen 61 bis 98. 4. Auflage, transpress Verlagsgesellschaft, Berlin 1994, ISBN 3-344-70841-4, S. 85 ff.
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