NZR WG class

{{Infobox locomotive

| name = NZR W^G class

| powertype = Steam

| image =Steam locomotive 492, Wg class ATLIB 307464.png

| alt =

| caption = W^G No. 492, Godber Collection, Alexander Turnbull Library.

| designer =

| builder = NZGR Hillside

| ordernumber =

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| buildmodel =

| builddate = 1910-1912

| totalproduction = 20

| rebuilder =

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| whytetype = 4-6-4T

| uicclass =

| gauge = {{RailGauge|3ft6in|lk=on}}

| leadingdiameter =

| driverdiameter = {{convert|45|in|m|3|abbr=on}}

| trailingdiameter =

| minimumcurve =

| wheelbase =

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| weightondrivers = {{convert|29.7|LT|abbr=on}}

| locoweight = {{convert|50.5|LT|t ST|1|abbr=off}}

| tenderweight =

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| fueltype = Coal

| fuelcap =

| watercap =

| tendercap =

| sandcap =

| boiler =

| boilerpressure = {{convert|200|lbf/in2|kPa|0|abbr=on}}

| feedwaterheater =

| firearea = {{convert|16.9|sqft|m2|abbr=on}}

| tubearea =

| fluearea =

| tubesandflues =

| fireboxarea =

| totalsurface = {{convert|738|sqft|m2|abbr=on}}

| superheatertype =

| superheaterarea =

| cylindercount = Two, outside

| cylindersize = {{convert|14|x|22|in|mm|0|abbr=on}}

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| poweroutput =

| tractiveeffort = {{convert|15330|lbf|kN|2|abbr=on}}

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| operator = NZR

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| locale = All of New Zealand

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}}

The NZR W^G class was a development of the preceding W^F class of all purpose tank locomotive. Later in their careers most (14) were rebuilt as W^W class.{{sfn|Lloyd|1974|p=64}} The locomotives were designed by A. L. Beattie, who described them as a "large tank locomotive."{{sfn|Palmer|Stewart|1965|p=100}}

In service

The locomotives were used on suburban trains in Wellington and Auckland.{{sfn|Palmer|Stewart|1965|p=100}}

= Rimutaka Incline =

File:Locomotive 480, Wg class, type 4-6-4T, built by New Zealand Railways at Hillside.jpeg.]]

W^G 480 was built by New Zealand Railways at Hillside (maker's no 104/10), and entered service in October 1910. It was altered for use on the Rimutaka Incline to assist the "Fell" locomotives cope with the military traffic to and from the New Zealand Expeditionary Forces training camp at Featherston. The cowcatchers were altered to clear the high Fell centre rail, and it had an acetylene headlamp arranged to follow the alignment of the track on curves. The locomotive was written off in June 1969, and preserved at the Glenbrook Vintage Railway.{{cite web|url=https://tiaki.natlib.govt.nz/#details=ecatalogue.293135|title=Steam locomotive 480, Wg class (4-6-4T type)|publisher=Alexander Turnbull Library|access-date=7 February 2020}}

Withdrawals

All of the locomotives were withdrawn by 1956.{{sfn|Palmer|Stewart|1965|p=100}}

References

= Bibliography =

{{Palmer & Stewart}}
{{cite book|title=Register of New Zealand Railways Steam Locomotives 1863-1971|first=W. G.|last=Lloyd|year=1974|edition=2nd|isbn=0-9582072-1-6}}
{{When Steam Was King}}

WG class

Category:Scrapped locomotives

Category:Railway locomotives introduced in 1910

Category:3 ft 6 in gauge locomotives of New Zealand