FM OP800

4 ft 8+1⁄2 in (1,435 mm) standard gaugeLength80 ft (24.38 m)Prime moverFM 5OP 38F-5-1/4-5Engine typeOpposed piston 2-stroke dieselAspirationRoots BlowerGeneratorWestinghouse DCTraction motorsDCCylinders5Cylinder size8 in × 10 in (203 mm × 254 mm)TransmissionDiesel-electricLoco brakeStraight airTrain brakes6-ET Air

Performance figures
Maximum speed	80 mph (130 km/h)
Power output	800 hp (600 kW)

Career
Operators	Southern Railway, Georgia and Florida Railroad, Georgia Northern Railway
Locale	North America
Disposition	All scrapped

The OP800 was a lightweight, streamlined railcar built by the St. Louis Car Company in 1939. Fairbanks-Morse supplied the 800 hp (600 kW), five-cylinder 8 in × 10 in (203 mm × 254 mm) opposed piston engine prime mover. The units were configured in a highly unusual 2-A1A wheel arrangement (later converted to 3-A1A)^[1] mounted atop a pair of road trucks, and equipped with a front swing coupler pilot. The aft section was divided into two separate compartments: one was used to transport baggage and the other served as a small railway post office, or RPO (the forward door, located just behind the radiator louvers, was equipped with a mail hook).

Six units, accompanied by matching trailing car sets, were manufactured exclusively for the Southern Railway. Two were later sold to the Georgia and Florida Railroad and Georgia Northern Railway as maintenance cars. The remaining four OP800s were scrapped in 1955; selected parts were retained for maintenance use on other SR F-M motive power.

At least four of these cars had individual names applied to them, including "Vulcan", "Cracker", "Joe Wheeler", and "Goldenrod".^[2]

No OP800 units survive.

See also

• Doodlebug (rail car)
• Seaboard Air Line 2027 & 2028, similar St. Louis Car Company built railcars, powered by EMD

References

Bibliography

• "Fairbanks-Morse 38D8 Diesel Locomotive". PSRM Diesel Locomotives. Archived from the original on October 25, 2014. Retrieved October 25, 2014.
• Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-026-7.
• Kirkland, John F. (November 1985). The Diesel Builders Volume 1: Fairbanks-Morse and Lima-Hamilton. Interurban Press. ISBN 0-916374-69-6.