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Noquay - Model Railway Inglenook Layout 4mm (OO)

Glossary of Railway & Model Railway Terms

A

  • ABS - A plastic used in model railways which is harder than Styrene.
  • Abutment - A foundation designed to hold back the pressure of solid ground, such as an end pier of a bridge.
  • ACC (Alphacyanoacrylate) - Super glue, also called CA.
  • Accommodation - A local train which makes all stops.
  • Adhesion - The frictional grip of the wheel to rail; Maintenance of contact between the wheels and the rail.
  • Adhesive Weight - The total of the driving wheel axle loads.
  • Air-brake - A braking system in which compressed air is used as the operating medium.
  • Airbrush - A miniature paint sprayer that that is used by artists and model builders to give a controlled application of paint.
  • Alternating Current (AC) - Standard 240 Volt (110V in USA) household current; or low voltage current used in model railway, usually around 18 Volts; An electric current that reverses its direction of flow at regular intervals. Each move from zero to maximum strength and back to zero is known as a cycle.
  • Ammeter - Meter used to measure current strength; How many amperes are being used by a motor or other electrical equipment.
  • Amp, Ampere - Unit used to measure electrical current strength.
  • Arc - Spark created by passage of current across a gap; also a curve.
  • Arch - A shallow, semicircular configuration, usually constructed of firebrick or similar material, in a steam locomotive firebox below the tubes. It is intended to promote more efficient fuel consumption and reduce the amount of smoke while protecting the flue tubes.
  • Armature - The wire-wound rotating part of a motor.
  • Articulated Locomotive - Any locomotive featuring two or more sets of wheels and cylinders mounted on separate or hinged frames. Permits large locomotives to snake around curves more easily.
  • Ash Pan - A tray under a steam locomotives firebox which accumulates ashes until an ash pit is reached.
  • Aspect - One of the lighted positions of a signal light.
  • ASTRAC (Automatic Simultaneous Train Control) - Automatic Simultaneous Train Control.
  • ATC (Automatic Train Control) - A term covering systems designed to assist the engineer and provide against mishandling or misinterpretation of signals. These systems range from simple cab warning systems to fully automatic control.
  • Automatic Block Signal - Signal activated by train entering a block.
  • Automatic Coupler - Couplers which will couple and uncouple automatically through the use of uncoupling ramps, permanent or electro-magnets; permits remote operation as opposed to manual hand methods.
  • Auxiliary Tender - A second tender; enables an engine to maintain longer runs and reduces intermediate water stops.
  • Axle Box - A metal casing that houses the axle bearing. Attached to the frame, the axle box transmits the weight of car to the axle.