Description Edward Turner designed the famous Triumph 'Speed-Twin' engine in 1937, and this exceptionally versatile configuration of the vertical twin cylinder four stroke engine then went on to power Triumph motorcycles, in many different versions, up until the nineteen eighties. In the early nineteen sixties Honda introduced their own parallel twin engine and this too was a ground-breaking design that was very successful for many years. This project will examine the design principles of each engine and will seek to propose a new design for a parallel twin cylinder engine that exploits as many of the best characteristics of both the Triumph and Honda designs as possible in one package. Key Objectives

1. To explore the workings of the Triumph parallel twin and the Honda twin engines and to define in detail the advantages and disadvantages of each.
2. Then to consider a basis for a hybrid design that could exploit the best of each design whilst minimising the less good characteristics of each engine.
3. Finally, to generate a conceptual design solution for the optimised hybrid engine, and to communicate that by means of a necessary and sufficient set of drawings and calculations.