GWR 4400 Class

{{Infobox locomotive

| powertype = Steam

| name = GWR 4400 Class

| image = Swindon 06 Works 2-6-2T and 0-6-0T on Dump geograph-2578500-by-Ben-Brooksbank.jpg

| caption = 4402 at Swindon 1950 awaiting scrapping

| designer = George Jackson Churchward

| builder = {{ubl|Wolverhampton Works (10)|Swindon Works (1)}}

| serialnumber = {{ubl|Wolverhampton: 765–774|Swindon: 2023}}

| builddate = 1905–1906, 1914

| totalproduction = 11

| whytetype = 2-6-2T

| gauge = {{track gauge|56.5in|allk=on}}

| leadingdiameter = {{convert|3|ft|2|in|mm|0|abbr=on}}

| driverdiameter = {{convert|4|ft|1+1/2|in|mm|0|abbr=on}}

| trailingdiameter = {{convert|3|ft|2|in|mm|0|abbr=on}}

| length = {{convert|36|ft|4+1/2|in|m|3|abbr=on}}

| width = {{convert|8|ft|7|in|m|3|abbr=on}}

| height = {{convert|12|ft|5+9/16|in|m|3|abbr=on}}

| locoweight = {{convert|56|LT|13|lcwt|abbr=on}}
({{convert|56|LT|13|Lcwt|ST|1|abbr=on|disp=output only}})

| fueltype = Coal

| fuelcap = Originally: {{long ton|2|3}}
Later: {{long ton|2|17}}

| watercap = {{convert|1000|impgal|abbr=on}}

| cylindercount = Two, outside

| cylindersize = {{convert|17|x|24|in|mm|0|abbr=on}}

| firearea =

| boilertype = Standard 5{{Cite book|last=Champ|first=Jim |title=An Introduction to Great Western Locomotive Development |year=2018|publisher=Pen & Sword Transport |isbn=978-1-4738-7784-9|location=Barnsley |oclc=1029234106 |ol=26953051M |page=319 }}

| boilerpressure = {{convert|180|lbf/in2|MPa|2|abbr=on}}

| tractiveeffort = {{convert|21440|lbf|kN|2|abbr=on}}

| operator = {{ubl|Great Western Railway|British Railways}}

| operatorclass =

| powerclass =

| axleloadclass =

| locale = Western Region

| withdrawndate = December 1949 – September 1955

| disposition = All scrapped

| notes = Sources for technical data: {{cite book |last=le Fleming |first=H.M. |editor-last=White |editor-first=D.E. |title=The Locomotives of the Great Western Railway, part nine: Standard Two-Cylinder Classes |date=February 1962 |publisher=RCTS |page=J44–J46 }}

}}

The Great Western Railway (GWR) 4400 Class was a class of 2-6-2T side tank steam locomotive.

History

They were introduced in 1904 for work on small branch lines. The 4500 class was a later development with larger driving wheels. The 4400s were particularly used in hilly districts, notably the Princetown and Much Wenlock Branches. All were withdrawn and scrapped between 1949 and 1955.

The 4400, 4500 and 4575 classes, which all had {{convert|24|in|0|abbr=on}} stroke cylinders, the Standard 5 boiler and driving wheels under {{convert|5|ft|3|abbr=on}}, were collectively known as "Small Prairies", as opposed to the 5100, 3150, 5101, 6100, 3100 and 8100 classes, with {{convert|30|in|0|abbr=on}} stroke cylinders, Standard 2 or 4 boilers and driving wheels over {{convert|5|ft|3|abbr=on}}, known as "Large Prairies".