View source for Saxon IIIb

{| class="wikitable float-right"  width="500" align="right"
|--
! colspan="5" style="color:white; background:#698B69" | '''Saxon IIIb''' <br/> DRG Class 52.70 <br/> DRG Class 34.77–78
|-
! colspan="5" align="centre |[[File:IIIb Pötzscha.jpg|300px|]]
|-
| Manufacturers: || [[Maschinenfabrik Esslingen|Esslingen]] || [[Berliner Maschinenbau AG|Schwartzkopf]] || [[Sächsische Maschinenfabrik|Hartmann]] || [[Henschel-Werke|Henschel]]
|-
| Quantity: || 14 <br/> Rebuild from [[Saxon III|III]]|| 32 || 157 || 15
|-
| Numbers: || 274–287 <br/> 52 7001 || 288–319 <br/> 34 7701–7702 || 320–334 <br/> 34 7721–7808|| 335–491 <br/> 
|-
| Entered service: || 1874 || 1873–1876 || 1874–1901 || 1876
|-
| Retired: || colspan="4"align="center" | by end of the 1920s 
|-
| [[Whyte notation|Wheel arrangement]]: ||colspan="4" align="center" | {{whyte|2-4-0}}
|- 
| [[UIC classification|Axle arrangement]]: || colspan="4" align="center" | 1'Bn2
|- 
| Service weight: || 34.6 t || colspan="3" align="center"| 35.8 t
|-
| [[Axle load]]: || colspan="4" align="center"| 11.5 t
|-
| [[Adhesive weight]]: || 23.1 t || colspan="3" align="center" | 23.8 t
|-
| Length over [[Buffer (rail transport)|buffers]]: || N/K || colspan="3" align="center"| {{convert|13854|mm|ftin|frac=4|abbr=on}} / {{convert|13050|mm|ftin|frac=4|abbr=on}}
|-
| [[Driving wheel]] diameter: || {{convert|1525|mm|ftin|abbr=on}} || colspan="3" align="center"| {{convert|1560|mm|ftin|frac=8|abbr=on}}
|-
| [[Carrying wheel]] diameter: || {{convert|990|mm|in|abbr=on}} || colspan="3"align="center" | {{convert|1035|mm|ftin|frac=8|abbr=on}}
|-
| Top speed: || {{convert|70|km/h|abbr=on}} || colspan="3" align="center"| {{convert|60|km/h|abbr=on}} / {{convert|70|km/h|abbr=on}}
|-
| [[Boiler]] [[overpressure]]: || 8.5 bar || colspan="3" align="center"| {{convert|10|kg/cm2|kPa psi|sigfig=3|abbr=on}}
|-
| [[Piston stroke]]: || colspan="4"align="center" | {{convert|560|mm|in|frac=16|abbr=on}}
|-
| [[Cylinder (locomotive)|Cylinder bore]]: || colspan="4" align="center"| {{convert|406|mm|in|frac=16|abbr=on}}
|-
| Grate area: || {{convert|1.55|m2|sqft|abbr=on}} || colspan="3"align="center" | {{convert|1.60|m2|sqft|abbr=on}} / {{convert|1.66|m2|sqft|abbr=on}}
|-
| Evaporative heating area: || {{convert|90.80|m2|sqft|abbr=on}} || colspan="3" align="center"| {{convert|92.93|m2|sqft|abbr=on}}
|-
| Brakes: || colspan="4" align="center" | [[Countersteam brake]]<br>[[Westinghouse Air Brake Company|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-Gesellschaft|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  [[Sächsische Maschinenfabrik|Hartmann]], [[Henschel-Werke|Henschel]] and [[Berliner Maschinenbau AG|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,<br /> 34 7721–34 7808.

==Rebuild of the Saxon Class III==
Later, 14 engines of the [[Saxon III|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 [[tender (rail)|tender]]s.

== References ==
{{Reflist}}
* {{Hütter-01bis45|pages=237–240}}
* {{Hütter-50bis53|pages=393}}
* {{Näbrich-EFA2.1|pages=123–139, 207–209}}
* {{Spielhoff}}
* {{Weisbrod-EFA1.1|pages=194–196}}
* {{Weisbrod-EFA1.2|pages=72–73}}

==See also==
*[[Royal Saxon State Railways]]
*[[List of Saxon locomotives and railbuses]]

{{Saxon locomotives}}

{{DEFAULTSORT:Saxon 03b}}
[[Category:2-4-0 locomotives]]
[[Category:Locomotives of Saxony|03 b]]
[[Category:Esslingen locomotives]]
[[Category:Berliner locomotives]]
[[Category:Henschel locomotives]]
[[Category:Sächsische Maschinenfabrik locomotives]]
[[Category:Railway locomotives introduced in 1873]]
[[Category:1B n2 locomotives]]
[[Category:Passenger locomotives]]