ALCO RSC-3

{{Short description|A 1,600 hp 6 axle diesel electric locomotive}}

{{Use dmy dates|date=November 2019}}

{{Infobox locomotive

| name = ALCO RSC-3

| powertype=Diesel-electric

| image = Arhs 4002 hawkesbury.jpg

| caption = New South Wales Government Railways 4002

| builder = ALCO
MLW

| buildmodel=RSC-3

| builddate = November 1950 – June 1955

| totalproduction = 99

| aarwheels = A1A-A1A

| gauge = {{Track gauge|ussg|allk=on}}
and others

| length = {{convert|53|ft|1|in|m|2|abbr=on}}

| width = {{convert|10|ft|m|2|abbr=on}}

| height = {{convert|14|ft|5|in|m|2|abbr=on}}

| locoweight = {{convert|254840|lb|kg|abbr=on}}

| fuelcap = {{convert|800|usgal|impgal L|0|abbr=on}}

| primemover = ALCO 12-244

| enginetype = V12 Four-stroke diesel

| aspiration = Turbocharged

| displacement = {{convert|8016|cuin|L|abbr=on}}

| cylindercount = 12

| cylindersize = {{convert|9|x|10+1/2|in|mm|0|abbr=on}}

|transmission=Electric

|generator=DC generator

|tractionmotors=DC traction motors

| maxspeed = {{convert|65|mph|km/h|0|abbr=on}}

| poweroutput = {{convert|1600|hp|kW|-1|abbr=on}}

| tractiveeffort = {{convert|42470|lbf|kN|2|abbr=on}}

| locobrakes=Straight air

| trainbrakes=Air

| locale = North America, Central America, South America, Portugal, Australia, Pakistan

}}

The ALCO RSC-3 was a diesel-electric locomotive of the road switcher type rated at {{Convert|1600|hp}}, that rode on three-axle trucks, having an A1A-A1A wheel arrangement.{{cite book |last1=Foster |first1=Gerald L. |title=A field guide to trains of North America |date=1996 |publisher=Houghton Mifflin |location=Boston |isbn=0-395-70112-0 |page=20}}

Used in much the same manner as its four-axle counterpart, the ALCO RS-3, though the axle load was spread out for operation on light rail such as are found on branch lines. This locomotive had much better success as an export unit than in the domestic market.