I know a lot of modellers are interested in odd uses of train parts, such as the well-known flatcar bridges. http://yardlimit.railfan.net/baldwindiesels/sierra/sp5247.jpg The short hood of a diesel locomotive, hooked up to and surrounded by some junk that should be easy for any modeller to find. What's it doing there? "The dynamic brake grids in the short hood are used for load testing the electrical system of a locomotive."
