Saxon VIb V

Saxon VIb V
DRG Class 34.80
Number(s) VIb V 161-174
DRG 34 8011
Quantity 14
Manufacturer Sächsische Maschinenfabrik
Year(s) of manufacture 1889
Wheel arrangement 2-4-0
Axle arrangement 1'B n2v
Gauge 1,435 mm (4 ft 8 1⁄2 in)
Length over buffers 15,083 mm (49 ft 5.8 in)
Service weight 367.7 kN
Adhesive weight 260.9 kN
Axle load 131.4 kN
Top speed 85 km/h (53 mph)
Driving wheel diameter 1,875 mm (6 ft 1.8 in)
Carrying wheel diameter 1,230 mm (4 ft 0 in)
Valve gear Allan
No. of cylinders 2
LP cylinder bore 650 mm (26 in)
HP cylinder bore 440 mm (17 in)
Piston stroke 560 mm (22 in)
Boiler Overpressure 12 bar
Grate area 1.82 m2 (19.6 sq ft)
Evaporative heating area 102.13 m2 (1,099.3 sq ft)
Tender sä 3T 9

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.

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

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