I'm with the others on the initial issues (though you did fix them). My biggest issue with the image is, What are you trying to accomplish with the shot? The front on shot does nothing from a composition point of view, then add in the completely blank background.
If you are looking for a shot that completely focuses on the train engine, a still life on a blank background, then I think the shot needs more of a side angle. It would show depth and add interest to the engine. It is too easy to look at the front and move on. Yes it leaves me wondering what the rest of the image might hold, but then it leaves me disappointed that I cannot see any more of it.
Where it might get interesting (and admittedly this is not even close to what you did, or maybe even what you were trying to do), would be to put a smoke plume, either drawn or photo, on the blank background. Then line up the shot so that the smoke appears to be coming out of the vents on the engine. It would add interest, and depth to the front on shot. If they line up right, but clearly look like 2 different mediums then it could be interesting. Or it could end up looking amateurish, but it was just an idea.
It would work best on the first image, since the background is directly over the stack. The second image if from the other side and the smoke would be over the rest of the engine, and it would look bad.