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DRG Class 98.10

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DRG Class 9810
A Class 98.10 from Falkenstein to Gfäll arriving at the station
Type and origin
Power typeSteam
Builder
Build date1929–1933
Total produced45
Specifications
Configuration:
 • Whyte0-8-2T
 • UICD1′ h2t
 • GermanL 45.11
Gauge1,435 mm (4 ft 8+12 in)
Driver dia.1,006 mm (3 ft 3+58 in)
Trailing dia.0,850 mm (2 ft 9+12 in)
Wheelbase:
 • Axle spacing
(Asymmetrical)
  • 1,415 mm (4 ft 7+34 in) +
  • 1,415 mm (4 ft 7+34 in) +
  • 1,070 mm (3 ft 6+18 in) +
  • 2,000 mm (6 ft 6+34 in) =
 • Engine5,900 mm (19 ft 4+14 in)
Length:
 • Over headstocks8,710 mm (28 ft 6+78 in)
 • Over buffers10,050 mm (32 ft 11+58 in)
Height4,250 mm (13 ft 11+516 in)
Axle load11.5 t (11.3 long tons; 12.7 short tons)
Adhesive weight46.2 t (45.5 long tons; 50.9 short tons)
Empty weight42.9 t (42.2 long tons; 47.3 short tons)
Service weight54.5 t (53.6 long tons; 60.1 short tons)
Fuel typeCoal
Fuel capacity2.7 t (2.7 long tons; 3.0 short tons)
Water cap.6.3 m3 (1,400 imp gal; 1,700 US gal)
Firebox:
 • Grate area1.34 m2 (14.4 sq ft)
Boiler:
 • Pitch2,450 mm (8 ft 12 in)
 • Tube plates3,500 mm (11 ft 5+34 in)
 • Small tubes45 mm (1+34 in), 89 off
 • Large tubes133 mm (5+14 in), 12 off
Boiler pressure12 kg/cm2 (11.8 bar; 171 psi)
Heating surface:
 • Firebox5.85 m2 (63.0 sq ft)
 • Tubes39.20 m2 (421.9 sq ft)
 • Flues16.36 m2 (176.1 sq ft)
 • Total surface61.41 m2 (661.0 sq ft)
Superheater:
 • Heating area18.93 m2 (203.8 sq ft)
CylindersTwo, outside
Cylinder size460 mm × 508 mm (18+18 in × 20 in)
Loco brakeCompressed-air brakes
Performance figures
Maximum speed45 km/h (28 mph)
Indicated power450 PS (331 kW; 444 hp)
Career
Operators
Numbers98 1001 – 98 1045
Retired1957–1966

The locomotives of DRG Class 98.10 (Baureihe 98.10 and, unofficially, the Bavarian GtL 4/5) were superheated steam locomotives with the Deutsche Reichsbahn-Gesellschaft.

After the Bavarian GtL 4/4 (Bayerische GtL 4/4) class engines had proved to be very reliable and had all been taken over by the Reichsbahn, it was decided to build further examples of them. However, because they were very slow with a top speed of 40 km/h (25 mph), the design was modified and the so-called GtL 4/5 was built with an additional trailing axle, that was linked to the final coupled axle by a Krauss-Helmholtz bogie.

In 1929 Krauss supplied the first five examples of these machines. In 1930 and 1931 there followed further batches of six and ten locomotives respectively. The remaining engines were manufactured by the newly created firm of Krauss-Maffei in 1932 and 1933.

In spite of the extra carrying axle the top speed could only be raised to 45 km/h (28 mph), so that later rebuilds or new engines were based on the GtL 4/4 (the rebuild becoming the DRG Class 98.11 (1′D)) and LAG Nos. 87 and 88 (1′D1′)).

All 45 locomotives of DRG Class 98.10 passed over to the Deutsche Bundesbahn after the Second World War. Their retirement began in 1957 and was complete by 1966.

See also

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References

[edit]
  • Weisbrod, Manfred; Petznik, Wolfgang (1981). Dampflokomotiven deutscher Eisenbahnen, Baureihe 97–99 (EFA 1.4) (in German) (2nd ed.). Düsseldorf: Alba. pp. 65–67, 196. ISBN 3-87094-087-5.