WAGR R class (diesel)

{{Short description|Class of Australian Co′Co′ diesel-electric locomotives}}

{{Use dmy dates|date=June 2016}}

{{Infobox locomotive

|name = Western Australian Government Railways R class

|powertype = Diesel-electric

|image = R1905 Manjimup, 1986.JPG

|alt =

|caption = R1905 at Manjimup in July 1986

|builder = English Electric, Rocklea

|ordernumber =

|serialnumber = A.166-A.167, A.171, A.173-A.174

|buildmodel =

|builddate = 1968

|totalproduction = 5

|rebuilder =

|rebuilddate =

|numberrebuilt =

|aarwheels = C-C

|uicclass = Co-Co

|gauge = {{track gauge|1067mm|lk=on}}

|trucks =

|bogies = English Electric low weight transfer

|wheeldiameter = {{convert|3|ft|1+1/2|in|m|3|abbr=on}}

|trailingdiameter =

|minimumcurve = {{convert|264|ft|m|3|abbr=on}}

|wheelbase = {{convert|40|ft|8|in|m|3|abbr=on}} total, {{convert|11|ft|3|in|m|3|abbr=on}} bogie

|length = {{convert|50|ft|m|3|abbr=on}} over headstocks

|width = {{convert|9|ft|4|in|m|3|abbr=on}}

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

|axleload = R1901-R1902: {{convert|15|LT|t ST}}, R1903-R1905: {{convert|16|LT|t ST}}

|weightondrivers =

|locoweight = R1901-R1902: {{convert|88|LT|t ST}}
R1903-R1905: {{convert|95.5|LT|t ST}}

|fueltype = Diesel

|fuelcap = {{convert|1200|impgal|L|abbr=on}}

|lubecap =

|coolantcap = {{convert|200|impgal|L|abbr=on}}

|watercap =

|sandcap =

|powersupply =

|consumption =

|watercons =

|primemover = EE 12CSVT Mk II

|rpmrange = 850rpm

|enginetype = four stroke, four valves per cylinder

|aspiration = turbo, intercooled

|displacement =

|alternator =

|generator = EE822/16J

|tractionmotors = EE548

|headendpower =

|cylindercount = 12 Vee

|cylindersize = {{convert|10|x|12|in|mm|0|abbr=on}}

|transmission =

|multipleworking = 110V, stepless electro-pneumatic throttle

|maxspeed = {{convert|60|mph}}

|poweroutput = {{convert|1950|hp|kW|-1|abbr=on}}, gross, {{convert|1795|hp|kW|-1|abbr=on}} net

|tractiveeffort = {{convert|50500|lbf|kN|1|abbr=on}} at {{convert|10.8|mph|kph|-1|abbr=on}}

|factorofadhesion =

|trainheating =

|locobrakes = Air, proportional control, dynamic

|locobrakeforce =

|trainbrakes = Dual air and vacuum

|safety =

|operator = Western Australian Government Railways

|operatorclass =

|powerclass =

|numinclass = 5

|fleetnumbers = R1901-R1905

|officialname =

|nicknames =

|axleloadclass =

|locale =

|deliverydate =

|firstrundate = February 12th, 1968

|lastrundate =

|retiredate =

|withdrawndate =

|preservedunits =

|restoredate =

|scrapdate =

|currentowner =

|disposition = 5 scrapped}}

The R Class are diesel locomotives built by English Electric, Rocklea for the Western Australian Government Railways in 1968. They were followed by the revised RA class.