The Pennsylvania A3 Switcher
.This project is a conventional rod locomotive, based on a small American prototype - an 0-4-0 tender locomotive the Pennsylvania Railroad used for shunting tightly curved locations. It shares common characteristics with Kozo’s other designs in that it is designed for 31?2” gauge, but can be scaled up to 7 1?4” gauge, involves no castings other than possibly the driving wheels, everything being built from the solid or fabricated. The drawings are imperial, and the descriptions are, as always brilliant,being mainly illustrative drawings rather than text. This engine is a great first project for the beginner, but will also be of interest to all model locomotive builders. 264 pages. Numerous drawings (including all the locomotive drawings) and photographs. Hardbound.
"Blondihacks" has done a series on YouTube about building this model - here is the first one, but there are already 22 instalments on YouTube as at October 2022: