The next project: Clue 2

There have been some really interesting guesses so far, most of them trying to apply the images directly to a type of locomotive. I can say that is the wrong route to go down.. the images all point to another "thing" and once you know that, the loco will be very obvious indeed.

To help out here is another picture that links with the previous 2 images.

And to finish it off, another image and a video. All of these are clues to the "thing", and that will then very clearly tell you the locomotive.

So, have at it. I look forward to seeing peoples ideas and I'll reveal the answer soon followed by the first WIP images of said loco.