The N scale AC4400CW is one of the most popular trains, be it a model or the real thing. The AC4400CW is simply known for it’s excellent paint, smooth performance, and easy to install parts and the N scale AC4400CW was modeled after that. The AC locomotive transmissions became popular in the 1990s and the AC4400CW was a favorite because it just couldn’t be beat from a lugging power perspective.