EMD FP9

{{Short description|American diesel locomotive}}

{{more footnotes|date=July 2016}}

{{Infobox locomotive

| name=EMD FP9

| powertype=Diesel-electric

| image=FP9Au RLGN 1400.jpg

| caption=RLGN 1400 (originally CN 6539) in 2003

| builder=General Motors Electro-Motive Division (EMD)
General Motors Diesel (GMD, Canada)

| buildmodel=FP9

| builddate=February 1954 – December 1959

| totalproduction=86

| aarwheels=B-B

| gauge={{track gauge|ussg}}

| trucks = Blomberg B

| wheeldiameter = {{convert|40|in|mm|0|abbr=on}}

| minimumcurve = 23° ({{convert|250.79|ft|m|2|abbr=on|disp=or}} radius)

| wheelbase = {{convert|43|ft|m|2|abbr=on}}

| length = {{convert|55|ft|2+1/4|in|m|2|abbr=on}}

| width = {{convert|10|ft|8|in|m|2|abbr=on}}

| height = {{convert|15|ft|m|2|abbr=on}}

| locoweight = {{convert|260000|lb|abbr=on}}

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

| primemover = EMD 16-567C

| rpmrange = 800

| enginetype = V16 Two-stroke diesel

| aspiration = Roots-type supercharger

| displacement = {{convert|9072|cuin|L|abbr=on}}

| generator = EMD D-12

| tractionmotors = (4) EMD D-37

| headendpower =

| cylindercount= 16

| cylindersize = {{convert|8+1/2|x|10|in|mm|0|abbr=on}}

| maxspeed={{convert|65-105|mph|kph|0|abbr=on}}

| poweroutput={{convert|1750|hp|kW}}

| tractiveeffort =

| locale=North America, Saudi Arabia

}}

The EMD FP9 is an American {{convert|1750|hp}}, B-B dual-service passenger and freight-hauling diesel locomotive that was produced between February 1954 and December 1959 by General Motors Electro-Motive Division, and General Motors Diesel. Final assembly was at GM-EMD's La Grange, Illinois plant, except for Canadian orders, which were assembled by Canadian subsidiary GMD at London, Ontario.

The FP9 was essentially EMD's F9 locomotive extended by {{convert|4|ft}} to give greater steam generator and water capacity for hauling passenger trains. A total of 86 cab-equipped lead A units were built; unlike the freight series, no cabless booster B units were sold. Regular F9B units were sometimes used with FP9 A units, since they, lacking cabs, had more room for water and steam generators. The FP9 and its predecessor, the FP7, were offshoots of GM-EMD's highly successful F-unit series of cab unit diesel locomotives.{{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=98}}