NER Class D
{{about|the 4-4-4T class|the 2-4-0 class|NER Class F}}
{{Use dmy dates|date=August 2017}}
{{Use British English|date=August 2017}}
{{Infobox Locomotive
|powertype = Steam
|name = {{Ubl | NER Class D | LNER Class H1}}
|image = Image from page 447 of "Railway mechanical engineer" (1916).jpg
|caption =
|designer = Vincent Raven
|builder = NER Darlington
|builddate = 1913, 1920—1922
|totalproduction = 45
|whytetype = 4-4-4T
|gauge = {{Track gauge|uksg|allk=on}}
|leadingdiameter = {{convert|3|ft|1+1/4|in|3|abbr=on}}
|driverdiameter = {{convert|5|ft|9|in|3|abbr=on}}
|trailingdiameter = {{convert|3|ft|1+1/4|in|3|abbr=on}}
|wheelbase = {{convert|34|ft|6|in|abbr=on}}
|locoweight = {{convert|87.35|LT|t ST|abbr=on}}
|fueltype = Coal
|fuelcap = {{convert|4|LT|t ST|abbr=on}}
|watercap = {{convert|2000|impgal|abbr=on}}
|cylindercount = three
|cylindersize = {{convert|16+1/2|x|26|in|0|abbr=on}}
|firearea = {{convert|23|sqft|abbr=on}}
|boilerpressure = {{convert|160|psi|MPa|abbr=on}}
|tubearea = {{convert|654.24|sqft|abbr=on}}
|fireboxarea = {{convert|124|sqft|abbr=on}}
|totalsurface = {{convert|1252.974|sqft|abbr=on}}
|fluearea = {{convert|280.6|sqft|abbr=on}}
|superheaterarea = {{convert|194.13|sqft|abbr=on}}
|superheatertype = Schmidt
|tractiveeffort = {{convert|22940|lbf|kN|abbr=on}}
|operatorclass =
|valvegear = Stephenson
|operator = North Eastern Railway, London and North Eastern Railway
|retiredate = 1931-1936
|disposition = All rebuilt to LNER Class A8
}}
The North Eastern Railway Class D (later London and North Eastern Railway (LNER) Class H1) was a class of 4-4-4T three-cylinder side tank steam locomotive designed by Vincent Raven in 1913.{{Cite book
|last=Ahrons |first=E. L.
|author-link=E.L. Ahrons
|title=The British Steam Railway Locomotive 1825-1925
|year=1927
|publisher=Locomotive Publishing Co. |location=Amen Corner, London
|ref=Ahrons, British Steam Railway Locomotive
|pages=338
}} They were used for rural passenger services. Forty five were built in total; a first batch of twenty, then a further twenty five after the War.{{Cite web
|title=NER Raven H1 4-4-4T Locomotives
|url=http://www.lner.info/locos/H/h1.shtml
|publisher=LNER Encyclopedia
}}
Between 1931 and 1936, all of the LNER H1 class were rebuilt with a 4-6-2T wheel layout and re-classified as A8.{{Cite book
|title=Locomotives of British Railways
|first1=H.C. |last1=Casserley
|author-link=H. C. Casserley
|first2=L.L. |last2=Asher
|publisher=Spring Books
|year=1961
|orig-year=1955
|ref=Casserley & Asher, Locomotives of British Railways
|pages=113, 472
}} They were scrapped between 1957 and 1960.
References
{{Reflist}}
{{LNER Locomotives}}
Category:2′B2′ steam locomotives
Category:Railway locomotives introduced in 1913
Category:Standard-gauge steam locomotives of Great Britain
Category:Passenger locomotives
{{England-steam-loco-stub}}