HO ATH 4-4-0 Steam Locomotive, PRR #1223 Overview
4-4-0 is the Whyte notation of a type of steam loco with a 4-wheel lead truck, 4 driving wheels, and no trailing wheels. Such a wheel arrangement Was popular worldwide, perhaps most famously in the United States between 1860 and 1890, where it was extremely popular. Such engines were well-suited to mixed service over relatively rough track. By 1890 they had largely fallen out of favor, having been superseded by 4-4-2, 2-6-0, and 2-6-2 types to varying degrees.