Edit:14 déc. 2016, Cre:03 nov. 2010
Peco (UK) manufactures a track named G-45 in silvernickel code 250, say a rail height of 6,35 mm (1/4"). At around 16 Euros per meter it is yet the lowest cost track available (setting aside aluminum track). The rail height lower than ordinary G track (LGB and others are code 332: 8.4 mm height) is more realistic and aesthetic.
Peco flexible track after bending.
Silvernickel is in this particular case done with less 10% Nickel, which give a slightly yellow color to the Peco rail (if not yellow colored, this is probably 18% nickel content, more costly). Silvernickel is around 20% more stiff than brass. Its main quality is though lower oxidation and the oxide is conductive.
Silvernickel is less conductive than brass, either electrically or thermally. For an electric network, it is, as for brass track, required to have intermediate supply from a main feeder cable every 3 to 4 meters. The good new is that due to low thermal conductivity, it is very easy to weld cables on rails (without burning the ties) with a 100 W iron welder (tin weld). You could even weld the rail joiners (without forgetting to let thermal expansion gaps, for example at each feeder supply).
There is only one switch size (with Peco), with an average radius of 1200mm, radius not being quite constant with straight ends and central part bent at 600 mm radius. It does not seems to influence running of rolling stock but could be questionnable for long locomotives. Aesthetic is less good than switch having a constant radius.
The angle is relatively low and rails are close. In theory, there is some risk of short-circuit by the locomotive current skids. Practically, there is no problem.
The switch points are maintained by a spring, so if the switch is run through in reverse while in the other position, the weight of the vehicle shall be sufficient to move the switch points. If this is a heavy loco, no problem, but if you are going wagons first, you may be in trouble, with the wagon climbing on the rails. Ballast first wagon if you operate such way.
The low cost manual control (to be ordered separately) needs assembly by gluing (glue not supplied). It give a good visual indication of the switch position at distance. It is a lever moving from one side to the other (travel is ~8 cm), so setting labels visible at distance is easy.
Peco does not supply motors for the switches in 'G' size, so you could use either LGB12010 or Piko PK35271 motors with an adaptator plate (to be ordered separately, ref PL8). For other motors see the page tracks. The point switch need good power because of the point spring. Motor supply voltage shall be sufficient (transfo 24VAC is better than 18 VAC).
Straight length of 314mm and curved length (radius 600mm: 12 length per circle) are available.
No crossing supplied by Peco, but you could find code 250 junctions (and other accessories) at Sunset Valley (USA). Though the rail height is the same, the bottom shape of the rail is not identical, so rail joiners shall be adapted. You could also use code 332 crossings (or other accessories with the special joiners designed to compensate the height difference.
Peco supply low cost track bumper style 'rail assembly', which shall be assembled directly on track by gluing (glue not supplied). After assembly they remain removable from the track by sliding (with the locked ties).
For the traditional analogic control:
Nota: This is this track that I bought at Track-Shack (who I recommend as a supplier).