If you use standard Flyer track at 40 inch diameter (20 inches radius) then you will have several inches to spare and an American Models GG1 will be fine.

Thanks very much

Some GG1’s will negotiate 031 track. How about using 036.

Just remember that real trains don't run on 3 rails.

My American Models GG1s run fine on Gilbert track.

@romiller49 posted:

Some GG1’s will negotiate 031 track. How about using 036.

My GG1 requires 036 unfortunately.  I wasn't smart enough when I bought it to check that.  I'm not so deep in this yet that I can't reverse course and go S gauge. 

@Roundhouse Bill posted:

Just remember that real trains don't run on 3 rails.

My American Models GG1s run fine on Gilbert track.

I'll remember that.

I bought the American Models GG1 when they first came out, sometime in the 80s and with a little lubrication, it's been running great ever since.  A full length O scale GG1 is LONG.  The S version is proportioned perfectly, and will negotiate Gilbert's tight radius track nicely.   Of course, i just HAD to add directional lights, illuminated classification lights and the capability to run on AC or DC.  But right out of the box, it's a winner.  According the AM website, the only version not available is the 5-stripe green livery.

Jerry,

I'm not a big train guy like the rest of you guys but I do feel great setting up trains around a Christmas tree every year.  I'm kind of torn between O and S gauge in liking the big Lionel equipment but there is something to be said for getting more "stuff" on a platform with S gauge.  BTW the 5 stripe green GG1 is the one I like. 

@Foxer55 posted:

BTW the 5 stripe green GG1 is the one I like.

Murphy's Law, perhaps? 

The is a green five striper on eBay.

There's one on eBay tonight

American Models S Gauge Pennsylvania 4-6-6-4 Electric Locomotive #4927 EX

5 viewed per hour

https://www.ebay.com/itm/Ameri...e:g:hjgAAOSwJiBfvFQr

Tom Stoltz

in Maine