I made my new animation recently and I want present here.
I found nice tutorial in here http://www.gryllus.net/Blender/3D.html
how to model and constraint steam engine and had an idea later how to improve it.
Here is a result.
Have fun!
where is your animation? 
Most excellent! The atmospheric elements works. Also, the soundtrack: what is the title and composer?
“Russian polka playing in the immigrant section of industrial-era New York City” - track is call Amazing Plan and you can find many other free tracks on this website http://incompetech.com/m/c/royalty-free/index.html?genre=Silent%20Film%20Score