Beleive it or not but their IS a large scale Kalmbach book that DOES feature an article on building an indoor layout. I know as I have it, but I cant remember the title, maybe Rene can help, I think its this one:
http://www.amazon.com/Beginners-Guide-Large-Railroading-Railroader/dp/0897783972/ref=pd_sim_b_5#_
That said I would refer to smaller scale books for things like benchwork and wiring, its identical in LS, you can even use HO Atlas block controllers with no problems like I have. but chances are you will have to come up with your own track plan, start sketching some ideas, then buy an LGB Track Planning Templete and use graph paper to determine what you might be able to lay down in the space you have.
http://www.gscalecentral.co.uk/f/m35256.aspx
Thiers a fellow on the British forum Gscalecentral who is doing a very cool layout in his finished attic, its about the same size worth looking at for ideas of what you can do, check the link above.
Have fun with your trains
Try Kalmbach's books, they won't give you step by step railroad, but they will have books on how to gardening, track laying, etc. Basically you just need to come up with a plan you like and follow the intructions in the book an how to complete each task. Hope this helps. - Peter
Modeling the Bellefonte Central Railroad
Fan of the PRR
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http://www.youtube.com/user/PennsyModeler
I don't think you will find any step by step instructions for making an indoor G scale layout.
That said, you could scale up an HO or O scale layout.
There is a $99 software package called RR-Track that makes it very easy to "snap together" sectional track to construct a track plan, and you can even add elevation and scenery.
Regards, Greg
Visit my site: http://www.elmassian.com - lots of tips on locos, rolling stock and more.
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I look for options to select a layout to build in my Atic, there is a lot on info. available for HO & N but did not find for Large Scale Indoor ( I live in Argentina), I have already tracks , rolling stock, etc .
I would like to find literature or other source where a layout will come complete as a Project ( Step by Step for Indoor), why ? , because I am good at copying with instructions, detailed if possible , not very good as a creator, can anybody help ?
Thanks
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