what is G Gauge ?

 
  Valvegear Oliver Bullied, CME

Location: Norda Fittazroy
This is an opportunity for me to ask a question.

G gauge - OK it's 45 mm.

What are O, HO and N gauges please?

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  lkernan Deputy Commissioner

Location: Melbourne
This is an opportunity for me to ask a question.

G gauge - OK it's 45 mm.

What are O, HO and N gauges please?
Valvegear
The reasoning with G is that it isn't a set scale.   People model all sorts of things but the track is always 45mm.

HO has HOn3.5, HOe, etc and O has On30, where the track gauge changes while the scale stays the same.
  Valvegear Oliver Bullied, CME

Location: Norda Fittazroy
Thanks for the answer; I think I'll stay out of modelling and stick with full size!
  michaelgm Chief Commissioner

N gauge is 9mm.
  LaidlayM Chief Commissioner

Location: Research
This is an opportunity for me to ask a question.

G gauge - OK it's 45 mm.

What are O, HO and N gauges please?
Valvegear
This is not such an opportunity, David has asked a specific question for a specific reason.  Please keep to the subject and ask your question elsewhere.
  dthead Site Admin

Location: Melbourne, Australia
agree mark, so made a new thread.
  Valvegear Oliver Bullied, CME

Location: Norda Fittazroy
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  LaidlayM Chief Commissioner

Location: Research
First you need to understand the difference between scale and gauge.  Gauge is simply the distance between the rail heads.  Scale is the proportional size difference between the model and the prototype.

Mark
  DJPeters Deputy Commissioner

G gauge is usually 45mm gauge track that can be run out in the Garden if need be hence the G scale. Not all track such as plastic type track can be used outside but most metal railed track can be and has been quite successfully as well. There are various scales that can run on this same track as well, some are quite close to one another and so you can run the different scaled stuff together if that is what floats your boat.

It is quite impressive as well and can be expensive as well but any model railway scale has an expense attached to it.

https://en.wikipedia.org/wiki/G_scale

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