Saxon VIb V

The Saxon Class VIb were four-coupled, tender locomotives in express train service with the Royal Saxon State Railways. In 1925, the Deutsche Reichsbahn grouped these engines into DRG Class 34.8.

Saxon VIb V
DRG Class 34.80
Number(s)VIb V 161–174
DRG 34 8011
Quantity14
ManufacturerSächsische Maschinenfabrik
Year(s) of manufacture1889
Wheel arrangement2-4-0
Axle arrangement1′B n2v
Track gauge1,435 mm (4 ft 8 1⁄2 in)
Length over buffers15,083 mm (49 ft 5 3⁄4 in)
Service weight367.7 kN
Adhesive weight260.9 kN
Axle load131.4 kN
Top speed85 km/h (53 mph)
Driving wheel diameter1,875 mm (6 ft 1 7⁄8 in)
Leading wheel diameter1,230 mm (4 ft 3⁄8 in)
Valve gearAllan
No. of cylinders2
LP cylinder bore650 mm (25 9⁄16 in)
HP cylinder bore440 mm (17 5⁄16 in)
Piston stroke560 mm (22 1⁄16 in)
Boiler Overpressure12 kg/cm2 (1,180 kPa; 171 psi)
Grate area1.82 m2 (19.6 sq ft)
Evaporative heating area102.13 m2 (1,099.3 sq ft)
Tendersä 3T 9

History

The Saxon Class VIb V locomotives were built from 1889 onwards in a total of 14 units by the Hartmann and were designed for hauling express trains. They were mostly retired by 1922. The Reichsbahn took over just one engine and gave it the running number 34 8011. It was retired in 1925.

Technical features

These locomotives were the first compound locomotives in Saxony. Its two-cylinder, compound engine was located behind the carrying axle and drove the final axle. The locomotives had an inside Allan valve gear. The steam dome was in the centre of the boiler over the middle axle. The running gear had an improved Nowotny carrying axle, nevertheless it did not have good riding qualities. The Schleifer brakes were later converted to Westinghouse brakes.

See also

Literature
  • Spielhoff, Lothar (1990). Länderbahn-Dampf-Lokomotiven. Band 1: Preußen, Mecklenburg, Oldenburg, Sachsen und Elsaß-Lothringen (in German). Stuttgart: Franckh'sche Verlagshandlung. ISBN 3-440-06145-0.
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