Photography Challenge #1: Photo 18 - Black and White

I've read that shooting black-and-white is a great way to improve your photography. It's reducing the variables to a single tonality, allowing you to concentrate on how the scene is lit instead of getting lost in all the colors. It's an interesting idea, and may be the theme for another Photography Challenge.

In the case of the Sterling Engine, black-and-white certainly accentuates the dust on the base plate.