GWR 3100 Class

{{Use dmy dates|date=January 2018}}

{{Use British English|date=January 2018}}

{{refimprove|date=March 2014}}

{{about|the 5 locomotives rebuilt in 1938/9 from the 3150 Class|the 40 locomotives built in 1903–06 as the 3100 class|GWR 5100 Class}}

{{Infobox Locomotive

| powertype = Steam

| name = GWR 3100 Class

| image =

| caption =

| designer = Churchward
(rebuilt by Collett)

| builder = GWR Swindon Works

| ordernumber = Lot 319

| builddate = 1906

| rebuilddate = 1938

| numberrebuilt = 5

| whytetype = 2-6-2T

| uicclass = 1'C1 h2t

| gauge = {{track gauge|uksg|allk=on}}

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

| driverdiameter = {{convert|5|ft|3|in|m|3|abbr=on}}

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

| minimumcurve = {{convert|6|chain|0}} normal,
{{convert|5|chain|0}} slow

| length = {{convert|41|ft|0|in|m|2|abbr=on}} over buffers

| width = {{convert|8|ft|11+1/4|in|m|3|abbr=on}}

| height = {{convert|13|ft|2|in|m|3|abbr=on}}

| axleload = {{long ton|19|3}}
({{convert|19|LT|3|Lcwt|ST|1|abbr=on|disp=output only}}) full

| weightondrivers = {{long ton|57|6}}
({{convert|57|LT|6|Lcwt|ST|1|abbr=on|disp=output only}}) full

| locoweight = {{long ton|81|9}}
({{convert|81|LT|9|Lcwt|ST|1|abbr=on|disp=output only}}) full

| fueltype = Coal

| fuelcap =

| watercap = {{convert|2000|impgal|abbr=on}}

| boiler = GWR Standard No. 4

| boilerpressure = {{convert|225|lbf/in2|MPa|abbr=on}}

| firearea = {{convert|20.56|sqft|m2|abbr=on}}

| tubearea = {{convert|1349|sqft|m2|abbr=on}}

| fireboxarea = {{convert|128.72|sqft|m2|abbr=on}}

| superheatertype = 4-element or 6-element

| superheaterarea = 4-element: {{convert|136.64|sqft|m2|abbr=on}},
6-element: {{convert|181.10|sqft|m2|abbr=on}}

| cylindercount = Two, outside

| cylindersize = {{convert|18.5|x|30|in|mm|0|abbr=on}}

| tractiveeffort = {{convert|31170|lbf|kN|abbr=on}}

| operator = GWR » BR

| operatorclass = 3100

| fleetnumbers = 3100–3104

| powerclass = GWR: D,
BR: 4MT

| axleloadclass = GWR: Red

| withdrawndate = 1957–1960

| disposition = All scrapped

}}

The Great Western Railway (GWR) 3100 Class was a class of 2-6-2T side tank steam locomotive.

History

This class of large prairie was created in 1938 when Collett rebuilt some of Churchward's 3150 Class engines for use as bankers, particularly from Severn Tunnel Junction shed. These engines used the same standard class 4 boiler, but with pressure increased to {{convert|225|psi|abbr=on}} and smaller {{convert|5|ft|3|in|3}} driving wheels and a {{convert|1/2|in|spell=in}} increase in cylinder diameter. This raised their tractive effort to {{convert|31,170|lb}}. Almost unnoticeable was a {{convert|2|in|mm|1|abbr=on}} reduction in pony truck wheel diameter to {{convert|3|ft|0|in|mm|0|abbr=on}}. Only five engines were ever modified, Nos. 3173, 3156, 3181, 3155 and 3179 which were rebuilt as 3100 to 3104 respectively. All members of the class were scrapped.

See also

References

  • {{Whitehurst GW Engines from 1940|pages=30, 102, 135}}

== External links ==

  • [http://www.railuk.info/steam/getsteamclass.php?item=3100 Class 3100 Details] at Rail UK

{{GWR Locomotives}}

Category:2-6-2T locomotives

3100

Category:Railway locomotives introduced in 1938

Category:Scrapped locomotives

Category:Standard-gauge steam locomotives of Great Britain

Category:1′C1′ h2t locomotives