Bavarian B IX

The B IXs of the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn), built from 1874, were the first express train locomotives in Bavaria. (N.B. The engines described here are not to be confused with the B IX steam engines built in 1870 and described under Bavarian B IX (1870).)

Bavarian B IX
DRG Class 34.74
Bavarian B IX "1000" in the Deutsches Museum
Number(s)602 STEINBERG to 139 SALZBURG
DRG 34 7421–7440
Quantity104
Year(s) of manufacture1874-1887
Retiredby 1924
Wheel arrangement2-4-0
Axle arrangement1B n2
Track gauge1,435 mm (4 ft 8 12 in)
Length over buffers13,960–14,050
Service weight33.6 t
Adhesive weight22.0 t
Axle load11.0 t
Top speed90 km/h
Driving wheel diameter1,870 mm
Leading wheel diameter1,170 mm
No. of cylinders2
Cylinder bore406 mm
Piston stroke610 mm
Boiler Overpressure10 bar
Grate area1.50/1.70 m2
Evaporative heating area88.50/91.00 m2
TenderBavarian 3 T 10,5
Water capacity10.5 m3
Locomotive brakesHeberlein quick-acting brake

As a result of the boiler being positioned low and the rear driving axle being under the outer firebox there was no longer any overhanging weight and the speed of the engine could be increased to 90 km/h. The locomotive could also haul a 150-ton train on the level at a speed of 70 km/h. The engines, retaining the design of their forerunners, had an outside locomotive frame and Stephenson valve gear. The units taken over by the Reichsbahn were run under the operating numbers 34 7421–7440. The locomotives built from 1874 were retired by 1924.

At the Deutsches Museum in Munich a sectioned example has been preserved. Parts of the collection, including the B IX, are stored in the Freilassing Locomotive World (Lokwelt Freilassing) museum in Freilassing due to a shortage of space.

The vehicles were coupled to Bavarian 3 T 10,5 tenders.

See also

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.