N масштабты теміржол моделдерінің өлшемдері

Modelling scale of 1:160, 1:150 (Japan), 1:148 (UK)
the model railway track size

N scale is a popular model railway scale. Depending upon the manufacturer (or country), the scale ranges from 1:148 to 1:160. Effectively the scale is 1:159, 9 mm to , which is the width of standard gauge railway. However the scale may vary to simulate wide or narrow gauge rail. In all cases, the gauge (the distance between the rails) is The term N gauge refers to the track dimensions, but in the United Kingdom in particular British N gauge refers to a 1:148 scale with 1:160 track gauge modelling. The terms N scale and N gauge are often inaccurately used interchangeably, as scale is defined as ratio or proportion of the model, and gauge only as a distance between rails. The scale 1:148 defines the rail to rail gauge equal to 9 mm exactly (at the cost of scale exactness), so when calculating the rail or track use 1:160 and for engines and car wheel base use 1:148. All rails are spaced 9 mm apart but the height can differ. Rail height (in thousandths of an inch) is expressed as a "code": thus, Code 55 rails are high while Code 80 rails have a height of Common real railroad rails are at least tall and can be taller on some roads, so at true scale the rails would be about high. An advantage of N scale is that it allows hobbyists to build layouts that take up less space than HO scale, or put longer track runs into the same amount of space, because the models are smaller (by nearly a half) than they are in HO scale (1:87). While N scale is quite small, it is not the smallest commercially available scale, as Z scale is smaller yet at 1:220 and T scale is 1:450 or 1:480. N scale is considered generally compatible with 1:144 scale for miniature wargaming.

Although trains and accessories of similar gauge or scale existed as early as 1927, modern commercially produced N scale models were first launched by the Arnold company of Nuremberg in 1962. Unlike other scales and gauges, which were de facto standards at best, within two years N scale manufacturers defined the gauge and voltage, as well as the height and type of couplers. For example, Arnold developed the now ubiquitous "Rapido" coupler to provide a simple and robust releasable coupler design. The MT couplers (as they are known) are more delicate and closer to scale North American appearance than Rapido couplers. Also, they can be opened by a magnet placed under the track. Other manufacturers, such as Atlas, McHenry and Kato, are now making couplers that mate with Micro Trains couplers. European modellers have the option to convert the couplings on their rolling stock to the Fleischmann Profi Coupler system for more reliable operation should they wish to do so, but most N scale rolling stock continues to be manufactured with Rapido couplers a design which is fairly robust and easy to mold. Modern N scale stock uses a standard NEM socket for couplers which allows different coupling designs to be used by simply pulling out the old coupler and fitting a new one of a different design. In the UK, vendors are increasingly shipping both NEM sockets for couplers and buckeye (knuckle) couplers. It is also very easy to use for coupling and uncoupling.

In the United States and Europe, models of standard gauge [] trains are built to 1:160 scale and made so that they run on N gauge track, but in some other countries changes are made. Finescale modellers also use variants of normal N scale.

In the United Kingdom, a scale of 1:148 is used for commercially produced models. In Britain, some N scale models are built to "2 mm scale" for "2 mm to the foot" which calculates to a 1:152 proportion. Early N scale was also known as "OOO" or "treble O" in reference to O and OO and was also 1:152, though for an entirely different reason.

A number of modellers in the United Kingdom use 2 mm scale, a closer to scale standard than N scale. 2 mm scale is scaled at 2 mm to the foot (1:152) with a track gauge. Nearer to scale appearance is achieved by finer rail, flange, and crossing dimensions than commercial N gauge components. A variation of the 2 mm standards is used by the FiNe group for 1:160 scale. It uses the same rail, flange, and crossing dimensions as 2 mm (1:152) standards, but with a track gauge of , and corresponding reduction in back to back. FiNe is dominated by European modellers.

In 1961, Lone Star introduced some of the first (1:160) N scale models branded as Treble 0 Lectric (OOO) into the United Kingdom. The original die cast metal models were push along and gauged to run on a die cast trackwork having a gauge that was closer to Coupling was by a simple loop and pin arrangement. The novelty of the "Lone Star Locos" line was such that they even found their way to the United States and were sold in the toys area of major department stores like J. J. Newberry. Electrified models followed soon after. The track gauge was widened to a nominal and rails were isolated with nonconductive ties (sleepers) for DC operation. Gearing between the motor and the axles at such a small scale was done by rubber bands, rather than the usual worm gear. A different coupling based on a shrunken OO scale coupling was fitted. The OOO couplings and specifications have long since been replaced by commercial N scale manufacturers.

Australian railways use several gauges across the states, although in most cases 9 mm gauge track is used. Some modellers have used Z gauge track for Nn3 models of Queensland Railways. N scale modelling in Australia has been a cottage industry affair, with typically small runs of resin based models being produced. Some etch brass kits have also been released. In most cases, the kits have been bodies designed to run on mechanisms or bogies available from overseas. Some very fine models are starting to emerge from various Australian manufacturers with many kits now available. Manufacturers have started to engage Chinese manufacturers to produce very high quality wagons and locomotives. The Victorian producer Aust N Rail pioneered this approach, while in 2011, BadgerBits released Australia's first ready to run N gauge locomotive, a 48 class retailing for around A$240. A new manufacturer has arrived on the scene (November 2011) with Australia N Railways using both Australian locally manufactured detail accessories and top end Chinese factories to produce their new locomotives and rolling stock. Other kits continue to be released using the more usual method of resin based castings and it is now possible obtain models of railways running in most states, although the coverage is highly variable.

Since the former Japanese National Railway and other major private railways adopted a track gauge of , Japanese N scale models of conventional railways adopted 1:150 scale with 9 mm gauge. But, in the case of Shinkansen, which adopted a track gauge, models are scaled down to 1:160. A small number of modelers adopted a model scale of 1:120 using 9 mm gauge tracks to represent the narrow gauge railway gauge lines common in Japan. This is a different prototype gauge and scale to standard N scale with the narrower prototype gauge and called TT 9.

In Germany, Wolfgang Frey started to build an N scale layout of the Stuttgart main railway station in 1978. Thirty years later, the project grew to more than Frey's "Stuttgart Hbf" layout is an exact replica of the Stuttgart main railway station with its related railyards in the 1970s. The layout is based on extensive background research of the prototype. The layout is computer controlled by 27 PCs running software developed by the owner of the layout and features very detailed and prototypical signalling systems. The layout was kept private until his untimely death in October 2012, but in 2017 should be opened as a public exhibition. One of the largest N scale layouts in the world is at the San Diego Model Railroad Museum in California, United States. Pacific Desert Lines is a layout featuring hand laid code 40 rail. Each piece of rail is high and is manually affixed to the roadbed by solder to copper clad ties placed every 5th tie. About 33 mile (53 km) (scale miles, actually 331.93 m) of mainline track are on this massive layout, as well as over 500 hand made turnouts. Many models of San Diego structures can be identified on the layout, including an intricate scale model of San Diego's Santa Fe Depot, the Western Metal Supply Building, the Carrizo Gorge's Goat Canyon Trestle, Palomar Observatory, the American Agar building, and the Carlsbad flower fields and power plant. The model of the Santa Fe depot was constructed using the actual building's blueprints and was featured on the cover of Model Railroader magazine. The Spanish Revival architecture is reproduced using epoxy castings of scale model adobe roof tiles. The Western Metal Supply Building (now part of the left field foul line in the San Diego Padres' Petco Park) was constructed using historic photographs and contains brick castings, brass etched fire escapes, and computer generated window panes. The detail on the Goat Canyon Trestle includes the prototype's railings, catwalks, and fire suppression system. The power plant contains fibre optic strobe lights in its chimney. Many buildings have detailed interiors, right down to the napkin dispenser and placemats on the tables at the corner café. Some surfers appear in the water off the coast. The layout can be operated by manual or computer control. Trains can run completely unattended or a single operator can control the layout with the click of a mouse. In the United States, a landmark N scale project layout, the Clinchfield, was built in 1978 by Gordon Odegard and featured in a series of articles for Model Railroader magazine. The article series was also reprinted in the book Modelling the Clinchfield in N Scale by Kalmbach Publishing. The Clinchfield layout measured and was noteworthy for a number of reasons: 1) it was highly portable because of its modular construction, 2) it showed the potential of high scenery to track ratios possible in 1:160, 3) it used a unique aluminum frame and (at the time revolutionary) styrofoam construction to cut down on weight and 4) it was highly prototypical for the era. The Clinchfield layout is one of the most famous American N scale layouts ever constructed and was awarded as the grand prize in a 1984 sweepstakes. The layout was also displayed at a number of train shows and has traded ownership several times by private collectors. The prototype Clinchfield Railroad was an operating and holding company for the Carolina, Clinchfield and Ohio Railway. The layout has been refurbished, outfitted for DCC, and was shown at the 2008 N Scale Collectors National Convention in Louisville, Kentucky. Also in the United States, a massive N scale semipublic layout, named East Valley Lines, is in Los Angeles, California. It is maintained by a semipublic special club and is part of Griffith Park.