Another round of hardy "THANKS YOUs" guys! Let me try to answer the new questions above:
The camera was not mounted inside the locomotive...way too large for that! It was mounted on a flat car in front of a Weaver locomotive running in conventional mode...in other words the old fashion way! I used a couple of rubber bands to secure the camera, which is basically a cylinder in shape, to the K-Line flat car. I used the K-Line flat car because it has heavy sprung metal truck which almost assures smooth running down the track and through switches. The camera is designed for "sports" activities outside so it has stability technology which limits quite nicely extraneous movements...
Peter...I'll try to take a few pictures of the flat with camera mounted. I took it off the flat car a few days ago to mount it on my hexacopter drone..
AlanRail...you talk in riddles my friend so I don't quite understand what you are saying above...too early for this pea-brain...LOL!
Alan