# Scale of G

Discussion in 'G / O / S Scale Model Trains' started by hk tam, Jan 11, 2006.

1. ### hk tamNew Member

Joined:
May 27, 2005
Messages:
15
0
Dear All,

I would like to ask what is the scale of "G" gauge? Is it same as "O" ?

many thanks

HK Tam

Joined:
May 15, 2002
Messages:
1,640
0
3. ### jetrockMember

Joined:
Dec 19, 2003
Messages:
956
0
It is nowhere near the scale of O. The problem is that more than one scale uses G "gauge" track. If you are modeling standard-gauge equipment, its scale is 1:29, if you are modeling meter gauge it is, I think, 1:24 and if you are modeling 3' gauge it is 1:20.3...roughly. Some manufacturers don't follow those figures exactly. So it depends on what kind of equipment you want to run.
4. ### spankybirdOTTS Founder

Joined:
May 13, 2005
Messages:
931
0
And then to add to the mix, you have Gauge1 which also uses 'G' gauge track. And it is 1:32 sign1 :curse:
5. ### Steamtom1Member

Joined:
Feb 8, 2005
Messages:
44
0
To determine the scale first you need to know what real life gauge you are modeling. Then you have to convert the gauge to millimeters, and divide by 45 mm. If you do the math, (remember this from Junior High?), you get the following:

Standard Gauge: (4 foot 8 ½ in.) converts to 1:31.9, or 1:32 rounded.

European Meter Gauge: (1000 mm) converts to 1:22.2

U.S. Narrow Gauge: (3 foot) converts to 1:20.3

Maine Narrow Gauge (2 foot) converts to 1:13.5

1:29 doesn’t correspond to anything in real life. It think it is meant to be an approximation of Standard Gauge.

Any more questions?
6. ### pgandwActive Member

Joined:
Jul 9, 2005
Messages:
1,113
0
The 1:29 scale was used by Aristo and some other folks instead of 1:32 for models of standard gauge so they wouldn't look so puny in comparison to the 1:20.3 models of narrow gauge.
7. ### Steamtom1Member

Joined:
Feb 8, 2005
Messages:
44
0
Sounds like a reasonable explanation. Here is a narrow gauge steam tram pulling a string of 1:32 coaches.

8. ### TinGoatIgnorant know it all

Joined:
Aug 29, 2002
Messages:
535
0
This is a good start.

"G" scale and/or "G" gauge are misnomers.

I model Hn42. That is H scale on Gauge 1 track. 1/2" = 1'. By ratio, it is 1:24. On Gauge 1 track, which is 45mm gauge that is close enough to 1 3/4" to scale out as 42" or 3' 6". So "H" is for half inch scale, "n" is for narrow gauge and 42 is the scale equivilent of Gauge 1 track.

"G" is for Garden, or Generic, or General...

Whatever you do, don't confuse Gauge with Scale.

Scale refers to the proportional relationship between the real thing (Prototype) and the model. Most accurately described with ratio. HO scale is 1:87. S sscale is 1:64, O scale is 1:48 and G scale is one of the many scales that run on gauge 1 track...

There is Zero Gauge, which is number 0. This gets translated into "O" scale, but it firstly applies to the track gauge of 32mm between the rails. For this, you have "O" scale (1:48) standard gauge. Which is actually a little wide. You could run H scale on 0 gauge track and it would be Hn30.

You can run H scale on HO gauge track (16.5mm) to represent 15" gauge. Hn15. Commonly known as Gn15...

Number One Gauge, which is gauge 1. This gets translated into almost all of the "G" scales. It is 45mm gauge which is very close to 1 3/4"

Joined:
Dec 20, 2000
Messages:
7,260