T gauge is a model railway scale with a track gauge of, referred from "Three-millimeter gauge" or "Third of N scale". It was introduced at the Tokyo Toy Show in 2006 by KK Eishindo of Japan, and went on sale in 2007. It is the smallest commercial model train scale in the world. Since mid-2009, Railway Shop is the exclusive licensed manufacturer. The models are powered with a battery-powered throttle at a maximum output of 4.5 V DC. To improve power pickup and tractive effort, the powered cars are fitted with magnetic wheels, and the track has steel rails. The first train released is the Japanese 103 seriescommuter train in different versions. Each standard trainset comes with two powered cars, which are located in the centre of the train. The front and rear cars are equipped with directional headlights. The tiny pantographs are made of etched stainless steel. The Hankyu Railway 9000 EMU Series and the Kiha 40 DMU were added to the line of available trainsets in early 2010, and feature improved mechanisms for better performance. Track is offered as flexible sections of rail and sleepers at, and as rigid sections with roadbed, and a small selection of pieces without roadbed. Rigid curved track is available with four different radii:, in 15° and 30° arc lengths; straight tracks are long. Points are available in a single length right and left hand with manual or electric throw. Crossovers are made in 30° and 90° in 60mm length. Several miscellaneous track sections are also sold including power, isolating, and level grade crossing. The standard sectional track is "roadbed" style, with integrated ballast, or without roadbed as “fine scale”. “Fine scale” track is available in Track without roadbed is available as curved sections of 90° arc length; straight tracks are long. The rail is approximately high. Track pieces are connected with gold-plated metal rail joiners plus plastic clips in the roadbed. Different types of dummy catenary masts can be attached to the track. The trains are powered by three 1.5 V AA batteries, an optional AC adaptor, or a USB plug. The direction of the train is changed by pressing a button. The control system includes two infrared sensors that can be clipped to the track. These sensors are used to automatically change the direction of the train if it is being operated on a linear track configuration, as opposed to a continuous loop. The throttle allows for either instant reversing, or reversing after a delay of approximately 5 seconds. The basic track set includes an oval of track, controller, electrical feeder, two sensors, rerailer, and a wheel cleaning device for the powered trains. The AC adaptor is available separately; plug versions for continental Europe, Britain and the US are available. In addition to the trains and track, available accessories include a large variety of scenic items: houses and apartment buildings, figures and animals, trees, bikes, boats and more. The houses are assembled and pre-painted, with fully detailed interiors that the modeller can install. The plastic figures, etched metal bikes, and other small items have small pins to make installation on a layout easier; the modeller simply makes a hole and inserts the detail into the hole using a toolkit available from Eishindo. Road signs, traffic lights and other street furniture is available, as well as a street decoration decal sheet, which comes with a scale ruler to aid the placement of markings and details. One unusual side-effect of the magnetic wheels of the powered units is that they can climb acute grades. T scale trains may be used with model aeroplanes and model airports in the 1:400/1:500 scale range. Eishindo has been planning to produce a modest line of aeroplanes and accessories of their own.
