DRG Class 98.11

DRG Class 98.11
Type and origin
Power type Steam
Rebuilder RAW Weiden
Rebuild date 1934–1941
Number rebuilt 29
Specifications
Configuration:
 ​
 • Whyte 2-8-0T
 • UIC 1′D h2t
Gauge 1,435 mm (4 ft 8 1⁄2 in)
Leading dia. 800 mm (2 ft 7 1⁄2 in)
Driver dia. 1,006 mm (3 ft 3 1⁄2 in)
Length 10,200 mm (33 ft 5 1⁄2 in)
Axle load 11.6 tonnes (11.4 long tons; 12.8 short tons)
Adhesive weight 42.5 tonnes (41.8 long tons; 46.8 short tons)
Loco weight 50.7 tonnes (49.9 long tons; 55.9 short tons)
Fuel capacity 2.6 tonnes (2.6 long tons; 2.9 short tons)
Water cap 5.1 m3 (180 cu ft) or 5,100 litres (1,100 imp gal; 1,300 US gal)
Firebox type  
 • Firegrate area 1.36 m2 (14.6 sq ft)
Boiler:
 ​
 • Tube plates 3,500 mm (11 ft 5 3⁄4 in)
Boiler pressure 12 kg/cm2 (1.18 MPa; 171 psi)
Heating surface 60.99 m2 (656.5 sq ft)
 • Tubes and flues 55.14 m2 (593.5 sq ft)
 • Firebox 5.58 m2 (60.1 sq ft)
Superheater:
 ​
 • Heating area 18.93 m2 (203.8 sq ft)
Cylinders Two
Cylinder size 508 mm × 460 mm (20 in × 18 1⁄8 in)
Loco brake Compressed air brakes
Performance figures
Maximum speed 55 km/h (34 mph)
Power output 331 kW (450 PS; 444 hp)
Tractive effort 101 kN (23,000 lbf)
Career
Operators
Numbers 98 1101 - 98 1129
Retired 1960–1968

The Class 98.11 steam locomotives of the Deutsche Reichsbahn were rebuilds of the Bavarian Class GtL 4/4 (DRG Class 98.8-9).

Because the riding qualities of the Class 98.10 were still not good enough to raise the speed of branch line (Lokalbahn) trains in Bavaria significantly, the Reichsbahn decided in 1934 to rebuild a Class GtL 4/4 engine (no. 98 906). Amongst other things, it was given an additional leading axle. As a result, the boiler and driver's cab had to be moved forward, which resulted in their having to be raised by 250 mm.

After trials with the locomotive had proved successful, it was decided to modify another 26 engines by 1939 and to allocate them to a new locomotive class. A further engine followed in each of the years 1940 and 1941. The rebuilds were given numbers 98 1101 - 98 1129.

The permitted top speed of the rebuilds could be raised to 55 km/h, compared with 40 km/h for the GtL 4/4 and 45 km/h for the Class 98.10.

All 29 locomotives survived the Second World War. Apart from 98 1108, which went to the DR in East Germany, they all went into the Deutsche Bundesbahn. The East German engine was retired in 1967; those in the West between 1960 and 1968.

See also

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