Saxon IIIb

Saxon IIIb DRG Class 52.7 DRG Class 34.77–78
Manufacturers:	Esslingen	Schwartzkopf	Hartmann	Henschel
Quantity:	14 Rebuild from III	32	157	15
Numbers:	274–287 52 7001	288–319 34 7701–7702	320–334 34 7721–7808	335–491
Entered service:	1874	1873-1876	1874-1901	1876
Retired:	by end of the 1920s
Wheel arrangement:	2-4-0
Axle arrangement:	1'Bn2
Service weight:	34.6 t	35.8 t
Axle load:	11.5 t
Adhesive weight:	23.1 t	23.8 t
Length over buffers:	N/K	13,854 mm (45 ft 5.4 in) / 13,050 mm (42 ft 10 in)
Driving wheel diameter:	1,525 mm (5 ft 0 in)	1,560 mm (5 ft 1 in)
Carrying wheel diameter:	990 mm (39 in)	1,035 mm (40.7 in)
Top speed:	70 km/h (43 mph)	60 km/h (37 mph) / 70 km/h (43 mph)
Boiler overpressure:	8.5 bar	10 bar
Piston stroke:	560 mm (22 in)
Cylinder bore:	406 mm (16.0 in)
Grate area:	1.55 m2 (16.7 sq ft)	1.60 m2 (17.2 sq ft) / 1.66 m2 (17.9 sq ft)
Evaporative heating area:	90.80 m2 (977.4 sq ft)	92.93 m2 (1,000.3 sq ft)
Brakes:	Countersteam brake Westinghouse compressed-air brake

The Saxon Class III b were German steam locomotives built for the Royal Saxon State Railways (Königlich Sächsische Staatseisenbahnen) in the late 19th century as tender locomotives for express train duties. In 1925, the Deutsche Reichsbahn incorporated the engines into DRG Class 34.77-78.

Between 1873 and 1901, a total of 204 locomotives were delivered to the Royal Saxon State Railways by the firms of Hartmann, Henschel and Schwartzkopff. During the course of their manufacture there were continual modifications. Eighteen were built as compound engines.

The Reichsbahn took over 91 machines and gave them the running numbers 34 7701, 34 7702,
34 7721–34 7808.

Rebuild of the Saxon Class III

Later, 14 engines of the Saxon Class III were equipped with Nowotny steerable axles and also classified as Saxon IIIb locomotives. Of fourteen such engines, only one entered the Deutsche Reichsbahn where it was given the running number 52 7001.

The locomotives equipped with Saxon sä 3 T 7.5 und sä 3 T 9 tenders.

References

See also

• Royal Saxon State Railways
• List of Saxon locomotives and railbuses

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. 

Classes of Saxon locomotive and railcars
Early locomotives	Saxon Saxonia to Tiger Saxon I Saxon BIIaT Saxon IIa Saxon IIIa
Passenger and express train locomotives	Saxon VIa Saxon VI Saxon VIb Saxon VIII 1 Saxon III Saxon IIIb Saxon VIb V Saxon IIIb V Saxon VIII 2 Saxon VIII V1 Saxon VIII V2 Saxon X V Saxon XII H Saxon XII HV Saxon XII H1 Saxon X H1 Saxon XII H2 Saxon XVIII H Saxon XX HV
Mixed traffic and goods train locomotives	Saxon II Saxon IIb Saxon VII Saxon Va Saxon V V Saxon I V Saxon IX V Saxon IX HV Saxon XI H Saxon XI HV Saxon XIV Saxon XIII H
Tank locomotives	Saxon IIb T Saxon I T Saxon H VIIIb T Saxon V T Saxon VII T Saxon IIIb T Saxon VII TS Saxon XVI T Saxon VII TOV Saxon XVI TV Saxon MI TV Saxon I TV Saxon IV T Saxon XI HT Saxon XIV HT Saxon XV HTV
Narrow gauge and fireless locomotives	Saxon I M Saxon Hg VII TK Saxon I K Saxon II K Saxon III K Saxon IV K Saxon V K Saxon VI K Saxon I F
Railbuses and electric locomotives	Saxon Hz 0 Saxon S 1 Saxon E 1 Saxon I ME Saxon I MET Saxon Dai 1 Saxon DET 1-2 Saxon 9015
Royal Saxon State Railways