Saxon IIIb
| Saxon IIIb DR series 52.70 DR series 34.77–78 |
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| Manufacturer: | Esslingen | Schwartzkopf | Hartmann | Henschel |
| Number: | 14 Conversion from III |
32 | 157 | 15th |
| Numbering: DR |
274-287 52 7001 |
288-319 34 7701-7702 |
320-334 34 7721-7808 |
335-491 |
| Commissioning: | 1874 | 1873-1876 | 1874-1901 | 1876 |
| Retirement: | until the end of the 1920s | |||
| Axis formula: | 1'Bn2 | |||
| Service mass: | 34.6 t | 35.8 t | ||
| Axle travel mass: | 11.5 t | |||
| Friction mass: | 23.1 t | 23.8 t | ||
| Length over buffers: | k. A. | 13,854 mm / 13,050 mm | ||
| Driving wheel diameter: | 1,525 mm | 1,560 mm | ||
| Impeller diameter: | 990 mm | 1,035 mm | ||
| Top speed: | 70 km / h | 60 km / h / 70 km / h | ||
| Boiler overpressure: | 8.5 bar | 10 bar | ||
| Piston stroke: | 560 mm | |||
| Cylinder diameter : | 406 mm | |||
| Grate area: | 1.55 m² | 1.60 m² / 166 m² | ||
| Evaporation heating surface: | 90.80 m² | 92.93 m² | ||
| Brake design : |
Countersteam brake Westinghouse Air Brakes |
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As Genus III b designated Royal Saxon State Railways Schlepptender locomotives for the express train service.
The Deutsche Reichsbahn assigned most of the locomotives from 1925 to the 34.77-78 series and one more to the 52.70 series .
history
Between 1873 and 1901 were purchased from Hartmann , Henschel and Schwartzkopff total of 204 locomotives delivered to the Royal Saxon State Railways. In the course of production there were always modifications. 18 vehicles were built as compound machines.
The Reichsbahn took over 91 machines and assigned the company numbers 34 7701, 34 7702 and 34 7721 to 34 7808.
Reconstruction of the Saxon genus III
Later, 14 machines of the Saxon class III were equipped with a Nowotny type steering axle and these locomotives were also classified as the Saxon IIIb. One locomotive was included in the final numbering plan from 1925 and was given the DR number 52 7001.
The locomotives were with a Tender respondents to type sa 3 T 7.5 and sa 3 T 9 equipped.
literature
Lothar Spielhoff: Länderbahn steam locomotives. Volume 1: Prussia, Mecklenburg, Oldenburg, Saxony and Alsace-Lorraine . Franckh'sche Verlagshandlung, Stuttgart 1990, ISBN 3-440-06145-0 .