Real Train Database

Real-world prototypes that inspired HO scale models

Every HO scale model is based on a real-world prototype — the actual locomotive or railcar that inspired its design. Understanding the prototype helps modelers choose accurate paint schemes, match equipment to the correct era, and build realistic consists. An EMD SD40-2 in BNSF heritage paint, for instance, tells a different story than one in original Burlington Northern green.

The TrainDex prototype database covers hundreds of diesel locomotive families (EMD, GE, Alco, and others), freight car types (boxcars, covered hoppers, tank cars, gondolas, and well cars), and passenger equipment (Budd streamliners, Pullman heavyweights, Amtrak Superliners). Each entry includes builder history, production dates, technical specifications, operating railroads, and a cross-reference to every HO scale model available from tracked manufacturers.

Total Prototypes
243
Diesel Locomotives
188
Freight Cars
40
Passenger Cars
15

40 results in Freight Car

Technical Specifications

SubtypePressurized/pneumatic covered hopper
AAR CodeLP
Car TypeCovered Hopper
Capacity Range1,500–3,000 cu ft / 100 ton
Common BuildersACF, Trinity
Typical CommoditiesCement, calcium carbonate, powder

History

The pressurized or pneumatic covered hopper, designated LP under the Association of American Railroads car classification system, emerged as a specialized response to the handling requirements of fin…

Technical Notes

The LP covered hopper is typically built with an interior volume ranging from approximately 1,500 to 3,000 cubic feet and is rated to 100 tons of load capacity…

Technical Specifications

SubtypeQuad hopper (4-bay)
AAR CodeHA
Car TypeOpen Hopper
Capacity Range4,000–5,000 cu ft / 100–120 ton
Common BuildersTrinity, FreightCar America
Typical CommoditiesCoal, taconite, aggregates

History

The four-bay open hopper, designated under the AAR classification code HA, represents one of the most significant freight car designs in North American railroad history. The development of the quad h…

Technical Notes

The quad hopper in its modern form typically offers an interior volume of between 4,000 and 5,000 cubic feet, with the precise figure varying according to the …

Model Manufacturers

Models by: ScaleTrains

Available as HO Models (1)

Technical Specifications

SubtypeRefrigerator car (AAR type)
AAR CodeRA
Car TypeRefrigerator
Capacity Range40–57 ft / 70–100 ton
Common BuildersPacific Car & Foundry, FMC
Typical CommoditiesPerishable food products

History

The refrigerator car, universally known in the railroad industry as a "reefer," emerged as a transformative piece of rolling stock in the decades following the American Civil War. The earliest practi…

Technical Notes

Under the Association of American Railroads classification system, refrigerator cars carrying the RA designation were purpose-built insulated freight cars equi…

Technical Specifications

SubtypeRotary dump ballast car
AAR CodeRB
Car TypeBallast Car
Capacity Range34–46 ft / 70 ton
Common BuildersVarious
Typical CommoditiesBallast, gravel (MoW service)

History

The rotary dump ballast car, designated under the AAR classification code RB, represents a specialized category of maintenance-of-way equipment developed to meet the demands of efficient track upkeep…

Technical Notes

Rotary dump ballast cars built to the RB classification were typically constructed in lengths ranging from approximately 34 to 46 feet over the coupler pulling…

Technical Specifications

SubtypeRotary-dump hopper
AAR CodeHR
Car TypeOpen Hopper
Capacity Range4,000+ cu ft / 100+ ton
Common BuildersJohnstown America, Trinity
Typical CommoditiesCoal (unit train service)

History

The rotary-dump hopper car, designated HR under the Association of American Railroads classification system, emerged as a specialized solution to the challenge of rapidly unloading bulk commodities a…

Technical Notes

Rotary-dump hopper cars in the HR classification are built to handle very large payloads, with capacity ratings generally exceeding 100 tons and cubic volumetr…

Technical Specifications

SubtypeSide-dump or bottom-dump car
AAR CodeDX
Car TypeDump Car
Capacity Range34–46 ft / 70–100 ton
Common BuildersVarious
Typical CommoditiesBallast, aggregate, construction debris

History

The side-dump and bottom-dump railroad car, designated under the AAR code DX, emerged as a specialized solution to the demanding material-handling needs of American railroads and the industries they …

Technical Notes

The AAR DX classification encompasses cars built in both side-dump and bottom-dump configurations, reflecting the two principal mechanical approaches to rapid …

Technical Specifications

SubtypeSmall covered hopper
AAR CodeLO
Car TypeCovered Hopper
Capacity Range2,000–3,000 cu ft / 70 ton
Common BuildersACF, Trinity, Pullman-Standard
Typical CommoditiesCement,ite, calcium, minerals

History

The small covered hopper, designated under the AAR classification code LO, emerged from the broader evolution of covered hopper car design that began in earnest during the early twentieth century. Ea…

Technical Notes

Small covered hoppers in the LO classification typically fall within a capacity range of approximately 2,000 to 3,000 cubic feet and are rated at around 70 ton…

Model Manufacturers

Models by: Atlas · Bowser · Intermountain · MTH · Rapido Trains · ScaleTrains · Tangent · Walthers

Technical Specifications

SubtypeSpine car / container car
AAR CodeS
Car TypeIntermodal
Capacity Range40–53 ft wells / 70–80 ton
Common BuildersGunderson, TTX, Trinity
Typical CommoditiesIntermodal containers (all commodities)

History

The spine car emerged as a direct response to the explosive growth of intermodal freight traffic in North America during the 1970s and 1980s. As railroads sought more efficient ways to handle ISO shi…

Technical Notes

The defining engineering characteristic of the spine car is its skeletal structure, consisting of a robust center sill running the full length of the car with …

Model Manufacturers

Models by: Bowser

Available as HO Models (1)

Bowser

Technical Specifications

SubtypeStandard boxcar (non-insulated)
AAR CodeXM
Car TypeBoxcar
Capacity Range40–60 ft / 70–100 ton
Common BuildersPullman-Standard, ACF, PC&F
Typical CommoditiesGeneral merchandise, paper, canned goods, appliances, auto parts

History

The standard non-insulated boxcar, designated XM under the Association of American Railroads classification system, represents one of the most fundamental and enduring freight car types in North Amer…

Technical Notes

The XM designation encompasses a broad range of non-insulated, general-service boxcars sharing certain fundamental characteristics. Cars in this category typic…

Model Manufacturers

Models by: Athearn · Atlas · Bowser · Intermountain · MTH · Rapido Trains · ScaleTrains · Tangent · Walthers

Technical Specifications

SubtypeStandard flatcar
AAR CodeFM
Car TypeFlatcar
Capacity Range40–89 ft / 70–100 ton
Common BuildersTTX, Thrall, Gunderson
Typical CommoditiesLumber, steel, pipe, military equipment, machinery

History

The standard flatcar represents one of the oldest and most enduring forms of railroad freight equipment in North America. In its most basic form, the flatcar predates even the boxcar, as early railro…

Technical Notes

Standard flatcars in the FM classification are typically constructed around a heavy steel center sill running the full length of the car, with cross-members an…

Operating Railroads

Model Manufacturers

Models by: Atlas · ScaleTrains

Available as HO Models (12)

Technical Specifications

SubtypeStandard gondola (low-side)
AAR CodeGB
Car TypeGondola
Capacity Range52–65 ft / 70–100 ton
Common BuildersThrall, Trinity, Bethlehem Steel
Typical CommoditiesSteel coils, scrap metal, pipe, lumber

History

The low-side gondola, designated under the AAR classification system as GB, represents one of the most versatile and widely used freight car types in North American railroad history. Open-top gondola…

Technical Notes

Standard low-side gondolas built to AAR GB specifications are typically constructed with interior lengths ranging from approximately 52 to 65 feet and are rate…

Model Manufacturers

Models by: Athearn · Atlas · Bowser · MTH · ScaleTrains · Tangent · Walthers

Available as HO Models (22)

Technical Specifications

SubtypeSteel coil car (covered)
AAR CodeCS
Car TypeCoil Car
Capacity Range42–52 ft / 100 ton
Common BuildersThrall, Trinity
Typical CommoditiesHot-rolled / cold-rolled steel coils

History

The covered steel coil car, designated by the AAR as class CS, emerged from a broader mid-twentieth century effort by American railroads to develop purpose-built equipment for transporting sheet meta…

Technical Notes

Covered coil cars in the CS class are typically built on car bodies ranging from approximately 42 to 52 feet in length and are rated at 100 tons capacity, refl…

Technical Specifications

SubtypeTOFC (trailer on flatcar)
AAR CodeFT
Car TypeIntermodal
Capacity Range85–89 ft / 70 ton
Common BuildersTTX, Thrall
Typical CommoditiesTruck trailers (all commodities)

History

The practice of moving wheeled vehicles aboard railroad flatcars has roots stretching back to the earliest decades of American railroading. In 1843, canal boats were transported over a portage railwa…

Technical Notes

TOFC flatcars built to the FT designation are purpose-designed to carry one or two standard highway semi-trailers, which in North American service are typicall…

Technical Specifications

SubtypeTri-level enclosed autorack
AAR CodeVB
Car TypeAutorack
Capacity Range89 ft / 70 ton
Common BuildersGunderson, Trinity, Greenbrier
Typical CommoditiesSedans, compact cars

History

The tri-level enclosed autorack represented the culmination of roughly two decades of experimentation and refinement in automobile transportation by rail. Early autoracks, introduced in the late 1950…

Technical Notes

The tri-level enclosed autorack classified under AAR code VB is built around an 89-foot structural frame capable of carrying loads up to 70 tons, with the thre…

Technical Specifications

SubtypeTriple hopper (3-bay)
AAR CodeHM
Car TypeOpen Hopper
Capacity Range3,200–4,000 cu ft / 100 ton
Common BuildersBethlehem Steel, Johnstown America
Typical CommoditiesCoal, coke, ore, ballast

History

The three-bay open hopper, designated under the AAR classification code HM, emerged as a direct response to the expanding demands of bulk commodity transportation in North America during the mid-twen…

Technical Notes

The AAR HM classification encompasses three-bay open hopper cars with a capacity range typically falling between approximately 3,200 and 4,000 cubic feet, rate…

Technical Specifications

SubtypeTwin hopper (2-bay)
AAR CodeHT
Car TypeOpen Hopper
Capacity Range2,000–2,500 cu ft / 70 ton
Common BuildersBethlehem Steel, Pullman-Standard
Typical CommoditiesCoal, aggregate, sand

History

The twin hopper, designated under the AAR classification code HT, emerged as one of the most practical and widely used freight car types in North American railroad history. Designed specifically for …

Technical Notes

The standard HT twin hopper was built to carry approximately 70 tons of lading, with interior cubic capacities generally ranging from around 2,000 to 2,500 cub…

Model Manufacturers

Models by: MTH

Available as HO Models (1)

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