There are so many engineering objects that when they work really well are also things of beauty - the immediate object that springs to mind apart from the components of the Trent is of course Concord(e). As a graduate electronic engineer, I can apply the same reasoning to many electronic concepts (such as Maxwell's equations) and circuits as well. In my student days, our Welsh lecturer in electronic circuits (responsible amongst other things for the sampling oscilloscope) used to tell us that circuits were built of components which could be regarded as words. These were then built up to make sentences. Complex circuits could then be regarded as paragraphs or even an essay. But the good ones... the good ones were regarded as a poem!
P.P.