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 …

2020年3月19日 · P4 or Protofour is a set of track standards using 4mm:1ft scale - the same as OO gauge - but with a slightly wider and more accurate track gauge. P4 modelling standards …

P4 (also known as Protofour) is as true to the scale of 4mm to 1ft (1/76 scale) as you can get, giving a true representation of a properly scaled OO gauge railway. This is what OO gauge …

The construction gauges ensure that you get the dimensions correct when you are constructing track without the need to measure anything; the wheels supplied already conform to P4 …

The Scalefour Society is a British organisation dedicated to the promotion and modelling of railways using the 4mm to 1-foot scale (1:76.2) with a track gauge of 18.83mm, commonly …

'P4' is the most uncompromising of scales yet some fine compromises helped create this unique layout set back in 1908, as JOHN GOWERS of Leamington and Warwick Model Railway Club …

2024年11月24日 · 'P4' is the most uncompromising of scales yet some fine compromises helped create this unique layout set back in 1908. In this feature JOHN GOWERS of Leamington and …

The "P" stands for "Proto[type]" and these standards are intended to be applied to any prototype gauge in 4 mm scale, which for standard gauge track happens to work out at 18.83 mm. P4 …

It's well known that P4 track gauge is 18.83mm. Not so widely known, especially for beginners, is what is the tolerance of the gauge? - in other words, what is the margin of error allowed in the …

In 1955 the EM Gauge Society was formed to promote the use of 18mm gauge (later refined to 18.2mm) and in the 1960s the use of the exact scale 18.83 gauge (known as P4) was …