WAGR M class

{{Short description|Class of Australian 2-6-0+0-6-2 Garratt locomotives}}

{{Infobox locomotive

|name = WAGR M/Ms class

|powertype = Steam

|image = M388, East Perth, 1926.jpg

|caption = M388 at East Perth Locomotive Depot, 1926

|designer = Beyer, Peacock & Co

|builder = Beyer, Peacock & Co

|ordernumber =

|serialnumber = 5477-5482, 5665-5671

|buildmodel =

|builddate = 1911, 1913

|totalproduction = 13

|rebuilder =

|rebuilddate =

|numberrebuilt =

|whytetype = {{whyte|2-6-0+0-6-2}} (Garratt)

|uicclass = {{ubl|M: (1′C)(C1′) n4t|Ms: (1′C)(C1′) h4t}}

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

|leadingdiameter =

|driverdiameter =

|trailingdiameter =

|minimumcurve =

|wheelbase =

|length =

|width =

|height =

|axleload =

|weightondrivers =

|locoweight = M: {{long ton|68|16|lk=on}}
Ms: {{long ton|69|16|lk=on}}

|tenderweight =

|locotenderweight =

|tendertype =

|fueltype = Coal

|fuelcap = {{convert|4|LT}}

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

|tendercap =

|sandcap =

|boiler =

|boilerpressure = {{ubl|M: {{convert|175|psi|MPa|2|abbr=on}}|Ms: {{convert|160|psi|MPa|2|abbr=on}}}}

|feedwaterheater =

|firearea = {{convert|22.6|sqft|m2|abbr=on}}

|tubearea = {{ubl|M: {{convert|1233|sqft|m2|abbr=on}}|Ms: {{convert|960|sqft|m2|abbr=on}}}}

|fluearea =

|tubesandflues =

|fireboxarea = {{convert|107|sqft|m2|abbr=on}}

|totalsurface = {{ubl|M: {{convert|1340|sqft|m2|abbr=on}}|Ms: {{convert|1067|sqft|m2|abbr=on}}}}

|superheatertype = {{ubl|M: N/A|Ms: Schmidt}}

|superheaterarea = {{ubl|M: N/A|Ms: {{convert|199|sqft|m2|abbr=on}}}}

|cylindercount = 4 (Garratt)

|cylindersize = {{ubl|M: {{convert|12.5|x|20|in|mm|0|abbr=on}}|Ms: {{convert|13.25|x|20|in|mm|0|abbr=on}}}}

|frontcylindersize=

|rearcylindersize =

|hpcylindersize =

|lpcylindersize =

|valvegear =

|valvetype =

|valvetravel =

|valvelap =

|valvelead =

|transmission =

|maxspeed =

|poweroutput =

|tractiveeffort = {{ubl|M: {{convert|22436|lbf|kN|2|abbr=on}}|Ms: {{convert|24488|lbf|kN|2|abbr=on}}}}

|factorofadhesion = {{ubl|M: 5.3|Ms: 5}}

|trainheating =

|locobrakes =

|locobrakeforce =

|trainbrakes =

|safety =

|operator = Western Australian Government Railways

|operatorclass =

|powerclass =

|numinclass =

|fleetnumbers = {{ubl|M388–M393|Ms424–Ms430}}

|officialname =

|nicknames =

|axleloadclass =

|locale =

|deliverydate =

|firstrundate =

|lastrundate =

|retiredate =

|withdrawndate =

|preservedunits =

|restoredate =

|scrapdate =

|currentowner =

|disposition = all scrapped}}

The WAGR M class was a class of {{Whyte|2-6-0+0-6-2}} Garratt-type articulated steam locomotives operated by the Western Australian Government Railways (WAGR) between 1912 and 1955. A total of 13 were built by Beyer, Peacock & Co, Manchester in two batches.{{sfn|Gunzburg|1984|p=92}}

History

The first batch of six engines was constructed in 1911. These engines, entered into service with WAGR in 1912, were only the third Garratt design to be produced and represented a significant step in the development of the type. The second batch, which consisted of seven units, was built in 1913/14 and designated as the Ms class due to the use of superheated steam. One of the engines from the first batch was retrofitted with a superheater and given a Ms classification.{{sfn|Gunzburg|1984|pp=90–92}}{{cite book|last=Turner|first=Jim|title=Australian Steam Locomotives 1896-1958|year=1997|publisher=Kangaroo Press|location=Kenthurst|isbn=086417778X|pages=54, 63}}

All of the M/Ms class locomotives were utilized to haul trains on the WAGR's light lines. They were withdrawn from service between 1947 and 1955, and all were scrapped.{{sfn|Gunzburg|1984|p=92}}

Class lists

=M class list=

The numbers and periods in service of each member of the M class were as follows:{{sfn|Gunzburg|1984|p=92}}

cellpadding="2"

|

{| class="wikitable sortable"

|+ M class, built by Beyer, Peacock & Co. in 1911:

!Builder's
number

!Fleet
number

!In service

!Withdrawn

!Notes

align=center|5477

|align=center|388

|{{dts|format=dmy|1912|March|2}}

|{{dts|format=dmy|1947|September|4}}

|

align=center|5478

|align=center|389

|{{dts|format=dmy|1912|March|9}}

|{{dts|format=dmy|1934|December|19}}

|Converted to Ms class

align=center|5479

|align=center|390

|{{dts|format=dmy|1912|March|16}}

|{{dts|format=dmy|1950|April|17}}

|

align=center|5480

|align=center|391

|{{dts|format=dmy|1912|March|23}}

|{{dts|format=dmy|1947|April|17}}

|

align=center|5481

|align=center|392

|{{dts|format=dmy|1912|March|30}}

|{{dts|format=dmy|1947|September|4}}

|

align=center|5482

|align=center|393

|{{dts|format=dmy|1912|April|6}}

|{{dts|format=dmy|1951|November|20}}

|

|}

=Ms class list=

The numbers and periods in service of each member of the Ms class were:{{sfn|Gunzburg|1984|p=92}}

cellpadding="2"

|

{| class="wikitable sortable"

|+ Ms class, built by Beyer, Peacock & Co.:

!Builder's
number

!Fleet
number

!Year built

!In service

!Withdrawn

!Notes

align=center|5478

|align=center|389

|align=center|1911

|{{dts|format=dmy|1935|April|12}}

|{{dts|format=dmy|1950|September|28}}

|Converted from M class

align=center|5665

|align=center|424

|align=center|1913

|{{dts|format=dmy|1913|September|27}}

|{{dts|format=dmy|1947|September|4}}

|Stowed 25 July 1945

align=center|5666

|align=center|425

|align=center|1913

|{{dts|format=dmy|1913|October|4}}

|{{dts|format=dmy|1947|September|4}}

|

align=center|5667

|align=center|426

|align=center|1913

|{{dts|format=dmy|1913|September|27}}

|{{dts|format=dmy|1947|September|4}}

|

align=center|5668

|align=center|427

|align=center|1913

|{{dts|format=dmy|1913|October|4}}

|{{dts|format=dmy|1947|September|4}}

|

align=center|5669

|align=center|428

|align=center|1913

|{{dts|format=dmy|1913|October|4}}

|{{dts|format=dmy|1952|February|14}}

|

align=center|5670

|align=center|429

|align=center|1913

|{{dts|format=dmy|1913|October|11}}

|{{dts|format=dmy|1955|January|13}}

|

align=center|5671

|align=center|430

|align=center|1913

|{{dts|format=dmy|1914|June|11}}

|{{dts|format=dmy|1953|May|29}}

|Erected at Midland Railway Workshops, October 1913, for State Saw Mills. In service at Manjimup, November 1913. Transferred to WAGR June 1914 in exchange for G57 & G59.

|}

Namesakes

The M class designation was previously used for the M class locomotives that were withdrawn in 1911. It was reused in the 1970s when the M class diesel locomotives entered service.