Minimum Turn Radius for USA Trains GP7/9 G-Scale - Model Train Forum - the complete model train resource
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G / #1 Scale Marklin, Aristocraft, USA Trains, LGB model train discussion, indoor and outdoor.


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Old 05-18-2016, 01:05 PM   #1
dchartier
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Minimum Turn Radius for USA Trains GP7/9 G-Scale

My lucky son is getting a USA Trains GP7/9 G-scale for his birthday. The brochure says that the engine requires turns with at least a 2.5' radius. That seems mighty small for such a big train. My big HO engines sometimes have trouble on turns that tight! In your experience, what is the minimum turn radius for that kind of engine, both from a functional perspective and in terms of looks?

I'd also appreciate a recommendation for brands and types of track. If you have different recommendations for indoor and outdoor use, I'd appreciate hearing both.
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Old 05-18-2016, 02:22 PM   #2
sirfoldalot
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You have a very lucky son! I would say it would work on a five foot circle. Little larger would be more comfortable and certainly look better.

I am not much use on track recommendations. I just bought some brass Aristro? five foot radius for my Christmas set.
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Old 05-18-2016, 04:20 PM   #3
dchartier
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Thanks, Dave! I probably go with at least 3' radius then just to make things look better. I never like seeing the front of the engine hanging halfway over the track on turns! :-)
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Old 05-19-2016, 08:36 AM   #4
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For some reason G scale gives curved track by diameter instead of radius so be aware when buying. I had Aristocraft brass track outside for many years with no problems but many in the hobby prefer stainless due to less maintenance.
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Old 07-09-2016, 02:47 PM   #5
jaody
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I have used Lgb track exclusive for 13 years on my out door railroad. I run track power with very few problems. All track joiners are assembled with electrical contact grease. Most problems were caused by deer stepping on it. I would highly recommend it in the 16000 or 18000 radius.
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Old 07-09-2016, 11:55 PM   #6
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I have used LGB 16000 and 18000 track outside for the last 13 years with no problems except for where the deer step on it
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Old 07-10-2016, 12:03 AM   #7
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I got rid of all of the 12000 ( 5'dia) And 15000 (7'dia. ) track because of clearance problems with long cars.
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Old 07-10-2016, 12:05 AM   #8
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I got rid of all of the 12000 ( 5'dia.) And 15000 (7'dia.) track because of clearance problems with long cars.
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Old 07-10-2016, 12:10 AM   #9
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Sorry still new at this!
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Old 08-13-2016, 12:00 PM   #10
NMTrains
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Go as big as your area can handle

I started my layout, thinking that I'd never need anything bigger that a 5' radius. Then the 2-8-8-2 Mallet appeared in my collection. Then the long passenger cars showed up.

For both esthetics and operation, my layout has a minimum of 8' radius and I changed out all the turnouts to the largest available.

The old rule of thumb. go as big as your situation allows.
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