View source for Oldenburg G 1

{{Infobox locomotive
| name             = Oldenburg G 1
| bgcolor          = 33009B
| color            = FE0000
| image            = LANDWUeHRDEN.jpg
| caption          = The Class G 1 locomotive, "Landwührden"
| builder          = [[Krauss-Maffei|Krauss]] inter alia
| builddate        = 1867–1877
| whytetype        = [[0-4-0]]
| DRGtype          = Goods train locomotive
| gauge            = {{Track gauge|sg|allk=on}}
| driverdiameter   = {{convert|1500|mm|ftin|frac=8|abbr=on}}
| serviceweight    = {{convert|21.3|t|abbr=on}}
| weightondrivers  = {{convert|21.3|t|abbr=on}}
| fuelcap          = 
| boilerpressure   = {{convert|10|kgf/cm2|kPa lbf/in2|sigfig=3|abbr=on}}
| fireboxarea      = {{convert|0.95|m2|abbr=on}}
| evaporativearea  = {{convert|75.0|m2|abbr=on}}
| cylindersize     = {{convert|355|mm|in|frac=16|abbr=on}}
| pistonstroke     = {{convert|560|mm|in|frac=16|abbr=on}}
| valvegear        = [[Allan valve gear|Allan]]
| maxspeed         = {{convert|45|km/h|mph|0|abbr=on}}
| fleetnumbers     = 46
| retiredate       = 1925
}}
The '''Oldenburg Class G1'''s were German [[steam locomotives]] procured by the [[Grand Duchy of Oldenburg State Railways]] (''Großherzoglich Oldenburgische Staatseisenbahnen'') from 1867 to 1877. They were intended to work both as [[tank engines]] as well as with a [[tender (rail)|tender]].

== Design ==
The G1 class were [[0-4-0]] locomotives, a configuration chosen for its simplicity and cheapness of construction. It had horizontal outside [[cylinder (locomotive)|cylinders]] and a number of original design features, including a radially-stayed, round-top [[firebox (locomotive)|firebox]] and a small '[[Steam locomotive components|regulator]] box' that replaced the usual [[steam dome]].{{sfn|Ransome-Wallis|1971|p=240}}

The [[locomotive frame]] was designed as a box with riveted steel plates that enabled it to double up as a [[boiler feedwater|feedwater]] tank, an arrangement known as the ''Krauss system''. It had an [[Allan valve gear]]. The [[connecting rods|connecting]] and [[coupling rods]] were made of fluted I-section steel, the first time such a form had been used, although [[Alfred Belpaire|Belpaire]] in [[Belgium]] was developing the same idea, independently, at the time.{{sfn|Ransome-Wallis|1971|p=241}}

== The first engine, ''Landwührden'' ==
At the [[world exhibition]] in [[Paris]] in 1867 the first locomotive, named ''Landwührden'' (see table photo), won a gold  medal for excellence and design of workmanship.{{sfn|Ransome-Wallis|1971|p=240}} This engine - which was also the first one built by [[Georg Krauss]] of [[Munich]] and therefore had the works number 1 – was withdrawn from service in 1900 and may be viewed today in the [[Deutsches Museum]] in Munich. It is the only surviving locomotive from the Grand Duchy of Oldenburg State Railways.{{sfn|Ransome-Wallis|1971|p=240}}

== Retirement ==
Nineteen of the engines were to have been taken over by the [[Deutsche Reichsbahn-Gesellschaft|Deutsche Reichsbahn]] as '''DRG Class 51.70''', but this did not happen because by the time the [[DRG renumbering plan for steam locomotives|final renumbering plan]] was drawn up in 1925, all the locomotives had been retired.{{sfnb|Hütter|2012|p=157}}

== Importance ==
According to Ransome-Wallis, "there is no doubt that this locomotive was, in many ways, an important 'landmark' in the history of locomotive development in Europe."{{sfn|Ransome-Wallis|1971|p=241}}

[[Image:MUeNSTERLAND.jpg|thumb|left|300px|"Münsterland" with a peat tender]]
{{clear|left}}

== See also ==
*[[Grand Duchy of Oldenburg State Railways]]
*[[List of Oldenburg locomotives and railbuses]]
*[[Länderbahnen]]

== Notes ==
{{reflist}}

== References ==
* {{Hütter-50bis53|page=157}}
* {{Ransome-Wallis 1}}

== Further reading ==
* {{cite book| first=Bernhard| last=Schmeiser| title=Krauss-Lokomotiven| publisher=Verlag Slezak| location=Wien| year=1977| isbn=3-900134-36-7| language=de}}

{{commons category|Oldenburgian G 1}}

{{Oldenburg locomotives}}

[[Category:0-4-0 locomotives]]
[[Category:B steam locomotives]]
[[Category:Grand Duchy of Oldenburg State Railways locomotives|G 1]]
[[Category:Railway locomotives introduced in 1867]]
[[Category:Krauss locomotives]]
[[Category:Standard-gauge locomotives of Germany]]