Comments on: Model Railway Scales And Gauges Demystified http://www.themodelrailroader.com/track-layout/model-railway-scales-and-gauges-demystified/ Get On The Inside Track About Model Railroading Mon, 23 Jan 2012 06:57:28 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: John Stickler http://www.themodelrailroader.com/track-layout/model-railway-scales-and-gauges-demystified/comment-page-1/#comment-2974 John Stickler Sat, 26 Feb 2011 15:54:55 +0000 http://www.themodelrailroader.com/track-layout/model-railway-scales-and-gauges-demystified/#comment-2974 What scale is O27? What scale is O27?

]]> By: John Stewart http://www.themodelrailroader.com/track-layout/model-railway-scales-and-gauges-demystified/comment-page-1/#comment-2846 John Stewart Fri, 21 May 2010 21:06:01 +0000 http://www.themodelrailroader.com/track-layout/model-railway-scales-and-gauges-demystified/#comment-2846 Good to see the list of many scales and gauges. In New Zealand, to model the local prototype (3' 6") there are three scales commonly used. Most popular is obviously Sn3-1/2. Smaller is N120 using N scale track and mechanisms. In a larger scale is 9mm with a scale ratio of 1:34, using 32mm gauge to represent the prototypes 3' 6". There are some excellent models and layouts in this large scale, sometimes referred to as New Zealand O Scale. I find your comment about HO being known as OO in Britain strange. These are two different scales, HO being 3.5mm to the foot and OO being 4mm to the foot, although in most cases OO is used with HO gauge track (16.5mm), and this represents a slightly narrower than prototype track gauge. There is some true 4mm scale/gauge modelling done and you have correctly listed this under the P4/EM area. It annoys me to see manufacturers (mainly from Britain) list a product as being OO/HO scale. They can't be both, although if it is track they can justifiably use OO/HO gauge, as this is assumed to be 16.5mm gauge track. Good to see the list of many scales and gauges.

In New Zealand, to model the local prototype (3′ 6″) there are three scales commonly used. Most popular is obviously Sn3-1/2. Smaller is N120 using N scale track and mechanisms. In a larger scale is 9mm with a scale ratio of 1:34, using 32mm gauge to represent the prototypes 3′ 6″. There are some excellent models and layouts in this large scale, sometimes referred to as New Zealand O Scale.

I find your comment about HO being known as OO in Britain strange. These are two different scales, HO being 3.5mm to the foot and OO being 4mm to the foot, although in most cases OO is used with HO gauge track (16.5mm), and this represents a slightly narrower than prototype track gauge. There is some true 4mm scale/gauge modelling done and you have correctly listed this under the P4/EM area.

It annoys me to see manufacturers (mainly from Britain) list a product as being OO/HO scale. They can’t be both, although if it is track they can justifiably use OO/HO gauge, as this is assumed to be 16.5mm gauge track.

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