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Classical Engine Design Calculations Using Spreadsheets. A.C.Erskine, R.Ali, G.G.Lucas, A.Hughes. Classical methods of design and analysis of engine components are in danger of fragmentation and falling into disuse because of their ad hoc development and lack of continuity of personnel. It is argued that although advanced and comprehensive numerical methods of analysis have recently become available to engine designers, classical techniques still have a useful role to play in the design office. To retain their continual use and to enhance it, it is necessary to translate and integrate the existing classical techniques into user friendly computer software. This has been achieved in a software package, CEDS, discussed in this paper. The software is quick and easy to use allowing rapid parametric studies in the early stages of design of components.

Computerisation of Classical Engine Design Techniques using Spreadsheets. A.C.Erskine, R.Ali, G.G.Lucas, A.Hughes. Traditionally, engine components have been analysed using models with sufficient simplification to enable solutions to be calculated by hand. With the increasing availability of powerful computers these ‘classical’ techniques are being forgotten in favour of more accurate, but more complex and time consuming, finite element methods. This paper discusses the benefits of using classical analysis techniques and describes a user-friendly, spreadsheet based system for their application. The Classical Engine Design System (CEDS) is quick and simple to use making parametric studies in the early design stages easy. These can be used to evaluate the feasibility of a design in order to justify time and money spend on further, more detailed analysis. Microsoft's Excel spreadsheet package, running on a P.C., has been used as a basis for the software.