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Learn the language of model railroading. From basic terminology to advanced concepts, our comprehensive glossary helps you understand every aspect of the hobby.
The crushed stone material spread between and around track ties to simulate the prototype railroad bed.
A DCC component that amplifies the command station signal to provide more power to the track.
An electrically isolated section of track that can be controlled independently.
Heavy gauge wire running beneath the layout that distributes power to track feeders.
An enclosed freight car with sliding doors used for general merchandise.
A vertical surface behind the layout depicting sky, distant scenery, or extending the modeled scene.
The structural framework that supports a model railroad layout.
A secondary rail line connecting to the mainline, often serving local industries.
A measurement indicating rail height in thousandths of an inch (e.g., Code 83 = 0.083 inches tall).
A track arrangement using two turnouts to allow trains to move between parallel tracks.
Programmable settings in a DCC decoder that control its behavior and characteristics.
The central DCC unit that generates digital signals and manages locomotive addresses.
Multiple locomotives programmed to operate together as a single unit.
The traditional end car of a freight train providing crew quarters and a rear lookout.
The mechanism that connects railroad cars together.
A detailed model kit requiring advanced skills and techniques to complete.
An index card or form identifying a specific freight car used with waybill operations.
A track arrangement allowing trains to circle indefinitely without reversing.
The makeup of a train - the specific locomotives and cars that comprise it.
A digital system allowing independent control of multiple locomotives on the same track.
The electronic chip installed in a locomotive that receives DCC signals and controls motor, lights, and sound.
A locomotive powered by a diesel engine driving electric traction motors.
The person who controls train movements over a railroad, issuing authorities and managing traffic.
A technique using almost-dry paint to highlight raised details and edges.
Water-slide transfers used to add lettering and graphics to models.
Adding small parts and refinements to improve model realism.
A small, detailed scenic display, often without operating capability.
The X-shaped component of a turnout where the diverging rails cross.
Track sections that can be bent to form curves of various radii, offering layout design flexibility.
Wires connecting the track to the power bus to ensure consistent electrical supply.
A freight car with a flat deck and no sides or roof, used for large or odd-shaped loads.
A clock that runs faster than real time to compress operations into a shorter session.
A fictional railroad created by a modeler rather than based on a specific prototype.
The largest common scale (1:22.5 to 1:29), popular for outdoor garden railways.
The distance between the inside edges of the rails on model railroad track.
An open-top freight car with low sides used for bulk materials, scrap, and machinery.
Materials applied to layout surfaces to simulate grass, dirt, gravel, and other terrain textures.
The slope of track expressed as rise over run, typically as a percentage.
The most popular model railroad scale at 1:87 proportion, running on 16.5mm gauge track.
A spiral track arrangement used to gain or lose elevation in a compact footprint.
A freight car with sloped floors and bottom doors for hauling bulk commodities like coal or grain.
The distinctive emblem or symbol of a railroad, appearing on equipment and structures.
The tightest curve on a layout, which determines what equipment can operate reliably.
A portable layout section built to a standard that can connect with others.
The primary through route on a railroad, typically handling the most traffic.
A miniature representation of a railroad, including trains, track, scenery, and structures.
A popular smaller scale at 1:160 proportion, ideal for limited spaces, running on 9mm gauge track.
Railroads with track gauge narrower than standard gauge (4 feet 8.5 inches), often modeled in various scale/gauge combinations.
National Model Railroad Association - the organization setting standards for the hobby.
A larger scale at 1:48 proportion popular for its impressive detail and presence.
The dominant British model railway scale at 1:76 proportion, running on 16.5mm gauge track.
Running a model railroad like a real railroad, with realistic train movements and car handling.
The movable rails in a turnout that direct trains to the diverging or through route.
Railroad cars designed to carry passengers, including coaches, sleepers, and diners.
A track arrangement where trains run between two endpoints rather than in circles.
The real, full-size railroad or equipment that models represent.
The foundation beneath track that provides support, absorbs sound, and creates realistic appearance.
Small metal connectors that join rail ends together, providing mechanical and electrical connection.
A track arrangement where a train can turn around, requiring special wiring to prevent short circuits.
A completed model requiring no assembly, ready to operate from the box.
A scale at 1:64 proportion, between HO and O, historically associated with American Flyer trains.
The proportion ratio between a model and its real-world prototype.
Pre-formed track pieces in standard lengths and curves that snap together for easy layout building.
A DCC decoder that includes a speaker and sound files to produce realistic locomotive sounds.
An electrical fault where power flows directly between rails without passing through a load, potentially damaging equipment.
A locomotive powered by a steam engine, iconic of railroading's golden age.
The landscape, vegetation, structures, and details that create the visual environment of a layout.
Synthetic fibers applied using electrostatic charge to create realistic standing grass.
Buildings and other constructed features on a layout, from industries to houses.
Building models from raw materials rather than from kits.
Hidden tracks representing the world beyond the visible layout where trains originate and terminate.
The process of moving individual cars between tracks to serve industries or build trains.
A track parallel to the main line used for passing, storing cars, or serving industries.
Extensive detailing work that brings a model to the highest levels of realism.
Joining metals using molten solder to create electrical connections or mechanical bonds.
A small railroad typically serving a limited geographic area or connecting to larger roads.
A scale at 1:120 proportion, between N and HO, popular in Eastern Europe.
A track arrangement allowing trains to switch from one track to another; also called a switch or points.
The handheld controller used to operate locomotives in DCC or DC systems.
The car attached to a steam locomotive carrying fuel and water supplies.
A cylindrical freight car for transporting liquids and gases.
The wheel and axle assembly beneath railroad cars that allows them to roll.
A schedule showing when trains should arrive at and depart from various locations.
The design showing how track is arranged on a layout.
The period (roughly 1940s-1960s) when railroads shifted from steam to diesel power.
A complete package including locomotive, cars, track, and power supply for immediate operation.
A pair of wheels mounted on a common axle.
Materials and techniques used to create realistic water scenes on layouts.
A document describing a freight car's cargo, origin, destination, and routing.
Techniques that add realistic wear, dirt, rust, and age to models.
A thin paint mixture applied to highlight detail and add depth to models.
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