If you are loco about locomotives then revells big boy locomotive plastic model kit might be for youthese tough american engines retired from service in 1961 but still stand as engineering marvels for their incredible carrying capacity of up to 4 200 tonnes their task was made heavier by the fact that they had to power their way through steep passes from utah to wasatch up only 25 were ever made but were separated into classes the first class were built in 1941 whilst the second were b