A 50cc four-cylinder two-stroke built by Duncan Mitchell of Moto Decla, Stevenage, in the early 1960s. The engine was designed by Eric Fitz-Hugh some years earlier and further developed by Mitchell, an experienced 50cc frame constructor, who also built a 5 speed gearbox for the machine. With a bore and stroke of 25.3 x 25mm, each cylinder has a capacity of 12cc. The machine was not completed due, it is said, to financial constraints.
Source: classic50racingclub.co.uk
