The Deutsche Reichsbahn had a standard passenger train tank engine with a wheel arrangement of 1′C1′ (UIC classification) or 2-6-2 (Whyte notation) and a low axle load, which was designated in their classification system as the DRG Class 64 (Baureihe 64). The Class 64 was developed from 1926 onwards and it was built between 1928 and 1940. Many German manufacturers contributed to the series.

DRG Class 64
64 419 of the DBK Historic Railway
Type and origin
Power typeSteam
Builder
Build date1928–1940
Total produced520
Specifications
Configuration:
 • Whyte2-6-2T
 • UIC1′C1′ h2t
 • GermanPt 35.15
Gauge1,435 mm (4 ft 8+12 in)
Leading dia.0,850 mm (2 ft 9+12 in)
Driver dia.1,500 mm (4 ft 11 in)
Trailing dia.0,850 mm (2 ft 9+12 in)
Wheelbase:
 • Axle spacing
(Asymmetrical)
  • 2,700 mm (8 ft 10+14 in) +
  • 1,800 mm (5 ft 10+78 in) +
  • 1,800 mm (5 ft 10+78 in) +
  • 2,700 mm (8 ft 10+14 in) =
 • Engine9,000 mm (29 ft 6+38 in)
Length:
 • Over headstocks
  • 001–367: 11,100 mm (36 ft 5 in)
  • 368–520: 11,200 mm (36 ft 9 in)
 • Over buffers
  • 001–367: 12,400 mm (40 ft 8+14 in)
  • 368–520: 12,500 mm (41 ft 18 in)
Height4,165 mm (13 ft 8 in)
Axle load15.2 t (15.0 long tons; 16.8 short tons)
Adhesive weight45.5 t (44.8 long tons; 50.2 short tons)
Empty weight58.0 t (57.1 long tons; 63.9 short tons)
Service weight74.9 t (73.7 long tons; 82.6 short tons)
Fuel typeCoal
Fuel capacity3 t (3.0 long tons; 3.3 short tons)
Water cap.9 m3 (1,980 imp gal; 2,380 US gal)
Firebox:
 • Grate area2.04 m2 (22.0 sq ft)
Boiler:
 • Pitch2,700 mm (8 ft 10+14 in)
 • Tube plates3,800 mm (12 ft 5+58 in)
 • Small tubes44.5 mm (1+34 in), 114 off
 • Large tubes118 mm (4+58 in), 32 off
Boiler pressure14 bar (14.3 kgf/cm2; 203 psi)
Heating surface:
 • Firebox8.7 m2 (94 sq ft)
 • Tubes53.7 m2 (578 sq ft)
 • Flues42.0 m2 (452 sq ft)
 • Total surface104.4 m2 (1,124 sq ft)
Superheater:
 • Heating area37.18 m2 (400.2 sq ft)
CylindersTwo, outside
Cylinder size500 mm × 660 mm (19+1116 in × 26 in)
Valve gearHeusinger (Walschaerts) with Kuhn slides
Train heatingSteam
Loco brakeK-GP
Performance figures
Maximum speed90 km/h (56 mph)
Career
NumbersDRG 64 001 – 64 520
Retired1975

Construction

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The boiler and elements of the driving gear were the same as those on the DRG Class 24. They had Bissel bogies, apart from the last ten engines which had a Krauss-Helmholtz bogie. From no. 64 368 onwards the engines were 100 millimetres (3+78 in) longer than their predecessors. The Class 64 engine was given the nickname "Bubikopf" ('bob') after a fashionable ladies hairstyle of the time.

Service

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After the Second World War 393 engines were still in service of which 278 went to the Deutsche Bundesbahn and 115 to the Deutsche Reichsbahn (East Germany). No. 64 311 remained in Austria after 1945 and became class 64 (Reihe 64) with the Austrian Federal Railways (Österreichische Bundesbahnen or ÖBB). Those engines left in Poland were given the classification OKl2 by the PKP. In 1968 there were still 60 machines in service with the Bundesbahn. Twenty Class 64 locomotives have been preserved, the majority in Germany.

Preserved Locomotives

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No. 64 491 at Neuenmarkt in 2010
 
No. 64 250 at Treignes in 2011

While the majority of the class 64s are preserved in Germany, seven of the class are preserved in other countries.

See also

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References

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  • Braun, Andreas (1986). Baureihe 64 Portrait einer Deutschen Dampflokomotive (in German). Bayerisches Eisenbahn-Museum Nördlingen. ISBN 3-925120-04-1.
  • Hütter, Ingo (2021). Die Dampflokomotiven der Baureihen 60 bis 91 der DRG, DRB, DB, und DR (in German). Werl: DGEG Medien. pp. 18–35. ISBN 978-3-946594-21-5.
  • Melcher, Peter (1988). Die Baureihe 64 Der legendäre Bubikopf (in German). EK-Verlag Freiburg. ISBN 3-88255-872-5.
  • Obermayer, Horst J.; Weisbrod, Manfred (1998). Die Baureihe 64 Eisenbahn-Journal Sonderausgabe II/98 (in German). Hermann Merker Verlag Fürstenfeldbruck.
  • Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1978). Dampflokomotiven deutscher Eisenbahnen, Baureihe 60–96 (EFA 1.3) (in German) (4th ed.). Düsseldorf: Alba. pp. 20–25, 227. ISBN 3-87094-083-2.
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