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  2. Maddox rod - Wikipedia

    en.wikipedia.org/wiki/Maddox_rod

    The Maddox rod test can be used to subjectively detect and measure a latent, manifest, horizontal or vertical strabismus for near and distance. The test is based on the principle of diplopic projection. [1] Dissociation of the deviation is brought about by presenting a red line image to one eye and a white light to the other, while prisms are ...

  3. John Armstrong (model railroader) - Wikipedia

    en.wikipedia.org/wiki/John_Armstrong_(model...

    Model railroad layout design and operations. John H. Armstrong (November 18, 1920 – July 28, 2004) was a mechanical engineer, inventor, editor, prolific author, and model railroader best known for layout design and operations. He was married for 44 years to Ellen Palmer. They had four children.

  4. Fixation disparity - Wikipedia

    en.wikipedia.org/wiki/Fixation_disparity

    A fixation disparity is not constant within a certain observer, but can vary depending on the viewing conditions. If test prisms with increasing amount are placed in front of the observer’s eyes, the fixation disparity changes in the eso direction with base-in prisms and in the exo direction with base-out prisms (Fig. 3).

  5. Lima (models) - Wikipedia

    en.wikipedia.org/wiki/Lima_(models)

    Website. limamodel.it. Lima S.p.A. (Lima Models) is an Italian brand and former manufacturing company of model railways. The company was headquartered in Vicenza for almost 50 years, from the early 1950s until the company ceased trading in 2004. Lima was a popular, affordable brand of 00 gauge and N gauge model railway material in the UK, more ...

  6. Rivarossi - Wikipedia

    en.wikipedia.org/wiki/Rivarossi

    Rivarossi model of 2-6-6-6. Rivarossi was founded in 1945 by Antonio Riva and Alessandro Rossi. [1] In the 1990s Rivarossi acquired Lima (1992), Jouef and Arnold (1997). In 2003 Rivarossi went into receivership. In 2004 Hornby Railways plc acquired assets from Rivarossi, in particular the brands Arnold, Jouef, Rivarossi and Lima.

  7. Digital Command Control - Wikipedia

    en.wikipedia.org/wiki/Digital_Command_Control

    Digital Command Control. Digital Command Control (DCC) is a standard for a system for the digital operation of model railways that permits locomotives on the same electrical section of track to be independently controlled. The DCC protocol is defined by the Digital Command Control Working group of the US National Model Railroad Association (NMRA).

  8. Rail transport modelling - Wikipedia

    en.wikipedia.org/wiki/Rail_transport_modelling

    Z scale (1:220) scene of a 2-6-0 steam locomotive being turned. A scratch-built Russell snow plow is parked on a stub (Val Ease Central Railroad). Railway modelling (UK, Australia, New Zealand, and Ireland) or model railroading (US and Canada) is a hobby in which rail transport systems are modelled at a reduced scale.

  9. Protofour - Wikipedia

    en.wikipedia.org/wiki/Protofour

    Model gauge. 18.83 mm (0.741 in) Prototype gauge. Standard gauge. Website. Scalefour Society. Protofour or P4 is a set of standards for model railways allowing construction of models to a scale of 4 mm to 300 mm (1 ft) (1:76.2), [1] the predominant scale of model railways of the British prototype. For historical reasons almost all manufacturers ...

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