The triple expansion marine engine model designed by O.B. Bolton is one of the iconic designs of model engineering. Despite being a complex model, it has proved to be extremely popular, and nicely finished examples can fetch good prices for second hand model dealers. The original design was revisited by John Bertinat in the mid 80s. This example is by J F and was shown at a Midlands Exhibition. Drawings, castings and instructions are readily available from a number of suppliers. Stuart Models also produce castings for their own, slightly smaller, triple.
Metric drawings by Julius are available on MEWS:
