Since it's Lego compatible, I would guess the track is too. It does look like Lego track, which has a gauge of 37.5 mm (~1.476 in.).
And now for the last pages. Pages 61 & 62 Pages 63 & 64 Pages 65 & 66 Pages 67 & 68 Pages 69 & 70 Pages 71 & 72 Pages 73 & 74 This was indeed a fun build
Here are a few more shots of the finished engine. Overall, the quality was excellent, all the parts were there and fit well, and the price was very good. I'll recommend it if you like this sort of stuff. Thanks for following along. Hope you enjoyed it. There is another engine on there that looks really kool as well. Reviews say it comes in a bag and no box. The price is good so I may give it a shot next.
Thank you sir. No Lego layout although that would be cool. Right now, I'm just trying to figure out a spot to display it
That's very neat @BNSF FAN. I still have the Lego 116 set from my childhood, released in '67 or '68. The locomotive is battery powered, connected to batteries in the tender. Boxcar doors are operable. As the box shows, there's an oval of track, built from 16 outside rails with ribbed railheads for better traction, 16 inside rails with smooth railheads, 8 straight rails with ribbed railheads and white crossties. My kid also enjoyed playing with it, so it's survived two generations.
That was an absolutely spectacular build, and I appreciate very much the step-by-step coverage of it. Thanks for sharing that and bravo for the result.