View source for NER Class R

{{Infobox locomotive 
|powertype=Steam 
|name = NER Class R <br> LNER Class D20
|image = Gateshead Locomotive Depot geograph-2327896-by-Ben-Brooksbank.jpg
|caption = 1907-built class R 2387, at Gateshead in 1954
|designer = [[Wilson Worsdell]]
|boiler = {{convert|4|ft|9|in|abbr=on}} diameter
|builder = NER [[Gateshead works|Gateshead]]
|builddate = 1899-1907
|totalproduction = 60
|whytetype = [[4-4-0]]
|gauge = {{Track gauge|uksg|allk=on}}
|leadingdiameter = {{convert|4|ft|0|in|3|abbr=on}}
|driverdiameter = {{convert|6|ft|10|in|3|abbr=on}}
|length = 
|wheelbase = {{convert|23|ft|9|in|abbr=on}} engine <br> {{convert|12|ft|8|in|abbr=on}} tender <br> {{convert|45|ft|10+3/4|in|abbr=on}} total
|locoweight = D20/1: {{convert|54.1|LT|t ST|abbr=on}} <br> D20/2: {{convert|55.45|LT|t ST|abbr=on}}
|tenderweight = {{convert|41.2|LT|t ST|abbr=on}}
|locotenderweight = D20/1: {{convert|95.3|LT|abbr=on}} <br> D20/1: {{convert|96.65|LT|t ST|abbr=on}}
|axleload = {{convert|19.8|LT|t ST|abbr=on}}
|fueltype = [[Coal]]  
|fuelcap = 
|watercap = 
|cylindercount = two inside
|cylindersize = {{convert|19|x|26|in|0|abbr=on}}
|boilerpressure = {{convert|200|psi|MPa|abbr=on}} <br> later reduced to {{convert|160|psi|MPa|abbr=on}}
|totalsurface = {{convert|1318.7|sqft|abbr=on}}
|firearea = {{convert|20|sqft|abbr=on}}
|fireboxarea = {{convert|139|sqft|abbr=on}}
|tubearea = {{convert|638.7|sqft|abbr=on}}
|fluearea = {{convert|292|sqft|abbr=on}}
|superheaterarea = {{convert|204|sqft|abbr=on}}
|tractiveeffort = {{convert|17025|lbf|kN|abbr=on}} <br> later reduced to {{convert|15567|lbf|kN|abbr=on}}
|valvegear = [[Stephenson valve gear|Stephenson]]
|operator = [[North Eastern Railway (UK)|North Eastern Railway]], [[London and North Eastern Railway]], [[British Railways]]
|powerclass = BR: 2P
|operatorclass=
|retiredate = 1943-1957
|disposition = All scrapped
}}
The '''NER Class R''' (later, '''LNER Class D20''') was a class of [[4-4-0]] [[steam locomotive]], designed by Wilson Worsdell for the [[North Eastern Railway (UK)|North Eastern Railway]].  They passed to the [[London and North Eastern Railway]] (LNER) in 1923.  In 1936, some were rebuilt with long-travel piston valves and classified D20/2.  The unrebuilt locomotives were re-classified D20/1.
== References ==
{{reflist}}
{{refbegin}}
* {{cite book| title=Ian Allan ABC of British Railways Locomotives, part 4| edition=1948| page=19}}
{{refend}}
== Other websites ==
* [http://www.railuk.info/steam/getsteamclass.php?item=D20/1 D20/1] {{Webarchive|url=https://web.archive.org/web/20161220111639/http://www.railuk.info/steam/getsteamclass.php?item=D20/1 |date=2016-12-20 }} ''Rail UK''
* [http://www.railuk.info/steam/getsteamclass.php?item=D20/2 D20/2] {{Webarchive|url=https://web.archive.org/web/20161220111641/http://www.railuk.info/steam/getsteamclass.php?item=D20/2 |date=2016-12-20 }} ''Rail UK''
* [http://www.lner.info/locos/D/d20.shtml The W.Worsdell Class D20 (NER Class R) 4-4-0 Locomotives] ''LNER Encyclopedia''

{{LNER Locomotives}}
[[Category:Locomotives]]