I was just looking for info to answer Vadim's thread in another forum and I found this:
http://www2s.biglobe.ne.jp/~hidepon/5inch/ef210.html
Apologies if this has been posted before. I'm more of a railfan than a modeler, I don't know too much about this, but based on what the page says, this is 5-inch gauge, about 1/8.4 scale. Its length is 2160mm, and it weight 95 kilograms. It uses 24VDC power.
Even more: http://www2s.biglobe.ne.jp/~hidepon/5inch/5inch.html .