The Württemberg T 4 was a class of German, eight-coupled, goods train, tank locomotive operated by the Royal Württemberg State Railways.

Württemberg T 4
DRG Class 92.1
T4 No. 852 works photo, 1906
Type and origin
BuilderMaschinenfabrik Esslingen
Build date1906 and 1909
Total produced8
Specifications
Configuration:
 • Whyte0-8-0T
 • UICD n2t
 • GermanGt 44.16
Gauge1,435 mm (4 ft 8+12 in)
Driver dia.1,380 mm (4 ft 6+38 in)
Wheelbase:
 • Overall4,650 mm (15 ft 3 in)
Length:
 • Over beams11,000 mm (36 ft 1 in)
Height4,650 mm (15 ft 3 in)
Axle load16.10 tonnes (15.85 long tons; 17.75 short tons)
Adhesive weight64.50 tonnes (63.48 long tons; 71.10 short tons)
Empty weight49.80 tonnes (49.01 long tons; 54.90 short tons)
Service weight64.50 tonnes (63.48 long tons; 71.10 short tons)
Fuel capacity1.50 t coal
Water cap.6.00 m3
Boiler:
No. of heating tubes266
Heating tube length4,000 mm (13 ft 1+12 in)
Boiler pressure14.0 kg/cm2 (1.37 MPa; 199 psi)
Heating surface:
 • Firebox2.08 m2 (22.4 sq ft)
 • Radiative9.70 m2 (104.4 sq ft)
 • Tubes133.70 m2 (1,439.1 sq ft)
 • Evaporative143.40 m2 (1,543.5 sq ft)
Cylinders2
Cylinder size530 mm (20+78 in)
Piston stroke612 mm (24+18 in)
Valve gearWalschaerts (Heusinger)
Loco brakeScrew brake, counterpressure brake
Performance figures
Maximum speed52 km/h (32 mph)
Career
NumbersNr. 851–858
DRG 92 101–92 108
Retiredby 1948

When the T 3 locomotives were no longer capable of banking services on the Geislinger Steige, a locomotive was designed that was to develop twice the power. Because no more locomotives were needed for duties on the ramps, only eight were produced, of which five were supplied in 1906 and three in 1909. In their day they were the heaviest eight-coupled locomotives in Germany.

In designing the boiler, special emphasis had been laid on a large steam space and a low-lying firebox crown so that banking could be achieved with refilling with water, which led to a reduction in boiler pressure and a resultant drop in performance.

In order to reduce wear and tear on the tyres and brake shoes during descents, the engines were fitted with Riggenbach counter-pressure brakes.

In 1925 the Deutsche Reichsbahn took over all eight locomotives and grouped them into DRG Class 92.1 in their numbering plan. After the Second World War they ended up in the Deutsche Bundesbahn, where they were retired between 1946 and 1948 or sold as industrial locomotives.

See also

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References

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  • Lohr, Hermann; Thielmann, Georg (1988). Lokomotiven württembergischer Eisenbahnen (EFA 2.6) (in German). Düsseldorf: Alba. pp. 120–121, 165. ISBN 3-87094-117-0.
  • Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1978). Dampflokomotiven deutscher Eisenbahnen, Baureihe 60–96 (EFA 1.3) (in German) (4th ed.). Düsseldorf: Alba. pp. 181–184. ISBN 3-87094-083-2.