Baden IV c

The steam locomotives of Baden Class IV c were passenger locomotives operated by Grand Duchy of Baden State Railway in the former south German state of Baden.

Baden IV c
Number(s)	1 ... 393
Quantity	59
Manufacturer	MBG Karlsruhe
Year(s) of manufacture	1875–1887
Retired	1901–1925
Wheel arrangement	2-4-0
Axle arrangement	1B n2
Length over buffers	14,367 mm (47 ft 1 ^3⁄4 in)
Height	4,150 mm (13 ft 7 ^1⁄2 in)
Wheelbase	2,300 mm (7 ft 6 ^1⁄2 in) from 1879: 2,200 mm (7 ft 2 ^1⁄2 in)
Overall wheelbase	3,900 mm (12 ft 9 ^1⁄2 in)
Empty weight	31.80 t (31.30 long tons; 35.05 short tons)
Service weight	35.50 t (34.94 long tons; 39.13 short tons)
Adhesive weight	22.50 t (22.14 long tons; 24.80 short tons)
Axle load	11.30 t (11.12 long tons; 12.46 short tons)
Top speed	70 km/h (43 mph)
Driving wheel diameter	1,680 mm (5 ft 6 ^1⁄4 in)
Leading wheel diameter	1,080 mm (3 ft 6 ^1⁄2 in)
Valve gear	Stephenson
No. of cylinders	2
Cylinder bore	435 mm (17 ^1⁄8 in)
Piston stroke	610 mm (24 in)
Boiler Overpressure	9.0 kgf/cm^2 (883 kPa; 128 lbf/in^2)
No. of heating tubes	198
Heating tube length	3,300 mm (10 ft 10 in)
Grate area	1.47 m^2 (15.8 sq ft)
Radiative heating area	6.03 m^2 (64.9 sq ft)
Tube heating area	86.27 m^2 (928.6 sq ft)
Evaporative heating area	92.30 m^2 (993.5 sq ft)
Locomotive brakes	Screw brake, later several had counter-pressure brakes
Train brakes	Westinghouse compressed air brake

History

As part of the procurement of 2-4-0 locomotives in the early 1870s, a total of eight batches of Class IV c engines were ordered. These locomotives were used above all on lines with steep inclines in the Black Forest and the Odenwald. As a result, several engines were equipped with a Riggenbach counter-pressure brake.

Design features

Then dimensions of these engines were largely the same as those of the Class IV b. However the double frame was dropped and replaced by a simple plate frame. The engine had a very short wheelbase and as a result good curve-running performance. In addition the carrying axle had a side play of 10 mm. It was returned to its centre position by sloping bearing surfaces (geneigte Doppelflächen). The grate area of the firebox turned out to be very small; as a result its steam generation was not particularly satisfactory. Trials with ribbed tubes did not produce any improvements. The large steam dome sat on the rear boiler section.

The outside wet-steam engine had inside valves and drove the first coupled axle. The wheels were sprung with leaf springs located over the top, that were linked by a compensating lever between the coupled wheels.

The vehicles were equipped with tenders of classes 2 T 8 or 2 T 6.67. Several locomotives were equipped with rearward-facing driver's cabs on tenders. This enabled them to work routes without a turntable.

Sources

• Hermann Lohr, Georg Thielmann: Lokomotiv-Archiv Baden. transpress, Berlin 1988, ISBN 3-344-00210-4

See also

• Grand Duchy of Baden State Railway
• List of Baden locomotives and railbuses