OF ALL INDOOR SCALE subjects, the one that stands out compared with, say, aircraft, cars or ships, has been model trains. This is primarily because model railroads are not static models – instead, they are intended to be working miniature replicas. Mat Irvine: Model locos generally have built-in motors and run on tracks. But there are some exceptions, such as Kitmaster, a company that produced kits of locomotives and rolling stock. OK, there was also a Kitmaster motorcycle kit, the Ariel Arrow, but they were all static kits, to be displayed on your shelf along with those aircraft, cars and ships. The idea of static railway locomotive kits also appealed to the one country which was definitively built on the railroad, the USA. Here, Monogram made two static loco models, one of which was the largest steam locomotive ever built, the Big Boy. The Big Boy kit shown here is a Revell-Germany issue, and dates from a few years ago, though it is still in the company catalo...