MRWA D class

{{Short description|Class of Australian 4-8-0 locomotives}}

{{Use Australian English|date=October 2013}}

{{Use dmy dates|date=January 2024}}

{{Infobox locomotive

|name = Midland Railway of Western Australia
D Class

|image = D19, Arrino, 1943.jpg

|caption = D19 shunting at Arrino, 1943

|powertype = Steam

|builder = Baldwin Locomotive Works,
Philadelphia, USA

|serialnumber = 53001–53002

|whytetype = 4-8-0

|uicclass = 2'D

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

|driverdiameter = {{convert|3|ft|10.5|in|mm|0|abbr=on}}

|length = {{convert|55|ft|m|2|abbr=on}} {{nowrap|(incl tender)}}

|locoweight = {{convert|78.85|LT|t ST|abbr=on}} {{nowrap|(incl tender)}}

|axleload =

|boilerpressure = {{convert|160|psi|kPa|abbr=on}}

|firearea = {{convert|17|sqft|m2|abbr=on}}

|cylindersize = {{convert|18|x|23|in|mm|0|abbr=on}}

|maxspeed =

|poweroutput =

|tractiveeffort = {{convert|22,522|lb-f|kN|abbr=on}}

|numinclass = 2

|fleetnumbers = D19 - D20

|firstrundate = 1920

}}

The MRWA D class was a class of 4-8-0 type steam locomotives built by Baldwin Locomotive Works in Philadelphia, USA, for the haulage of goods traffic on the Midland Railway of Western Australia (MRWA).