Bavarian BB II

The Bavarian Class BB II engines were Mallet type, saturated steam locomotives in the service of the Royal Bavarian State Railways (Königlich Bayerische Staats-Eisenbahnen).

Bavarian BB II
DRG Class 98.7
DRG 98 727 in Sonderhofen, March 1973
Type and origin
BuilderMaffei
Build date1899–1908
Total produced31
Specifications
Configuration:
​
 • Whyte0-4-4-0T
Gauge1,435 mm (4 ft 8+1⁄2 in)
Driver dia.1,006 mm (3 ft 3+1⁄2 in)
Length:
​
 • Over beams10,010 mm (32 ft 10 in)
Axle load10.7 t (10.5 long tons; 11.8 short tons)
Adhesive weight42.6 t (41.9 long tons; 47.0 short tons)
Service weight42.6 t (41.9 long tons; 47.0 short tons)
Boiler pressure12 kgf/cm2 (1,180 kPa; 171 lbf/in2)
Heating surface:
 • Firebox		1.40 m2 (15.1 sq ft)
 • Evaporative67.70 m2 (728.7 sq ft)
Cylinders4, compound
Piston stroke530 mm (20+7⁄8 in)
High-pressure cylinder310 mm (12+3⁄16 in)
Low-pressure cylinder490 mm (19+5⁄16 in)
Performance figures
Maximum speed45 km/h (28 mph)
Indicated power380 PS (279 kW; 375 hp)
Career
Numbers
  • K.Bay.Sts.E: 2501–2531
  • DRG 98 701 – 98 731
Retired1940 (?)

They were specially designed for branch lines with tight curves and supplied in two series. The first series comprised 29 engines and was built between 1899 and 1903. The other two machines were delivered in 1908 to the state railway and were somewhat longer and heavier than the other locomotives.

Although the Deutsche Reichsbahn-Gesellschaft took over all the vehicles in 1925 as DRG Class 98.7, all bar three were retired during the 1930s due to their unsatisfactory riding performance. The last three engines were used after 1940 as industrial locomotives.

One example, the 98 727, was sold in 1943 to the Regensburg factory of Südzucker AG and was given the operating number 4. It was donated in 1972 to the Darmstadt-Kranichstein Railway Museum (Eisenbahnmuseum Darmstadt-Kranichstein) and is still preserved today.

98 713 was used in Regensburg as well, was exported to Albania in 1943 to be used by Wehrmacht and Hekurudha Shqiptare. Served until 1950 and still could be seen in 1985.[1]

References and notes
  1. Molter, Romano (2020). Die vergessene Eisenbahn: Eine Reise in die Geschichte der albanischen Eisenbahnen 1916-2020 (in German). Railway-Media-Group. ISBN 9783902894878.
  • Weisbrod, Manfred; Petznik, Wolfgang (1981). Dampflokomotiven deutscher Eisenbahnen, Baureihe 97–99 (EFA 1.4) (in German) (2nd ed.). Düsseldorf: Alba. pp. 59–61, 194–195. ISBN 3-87094-087-5.
Wikimedia Commons has media related to Bavarian BB II.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.