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For decades the operational dynamics of the compression ring during operation, have been subject to debate [1,2,3,4,5,6,7]. A complex computer simulation, using Design Of Experiments (DOE) methodology, was developed to study the effect of the compression ring rotation during running-in stages. Response Surface (RS) has been used to optimize ring displacement, as function of ring mass, width and radius. The optimised surface response has been compared to used compression rings and has shown a 2% variation between calculated and measured values.

In this paper the authors present a novel system, the Dickinson Rotating Ring Contact Profiler (DRRCP) for measuring the surface profiles of components with ring profiles. Race car piston rings have been used as a test case to prove the simplicity and validity of the new system. The results obtained from the DRRCP were compared with the standard system and similar values of the mean and standard deviation were obtained, Ra = 0.3±0.05 and Rz = 0.6 ± 0.09 respectively. The system is readily adaptable to other cylindrical components and is predicted to have further applications in other fields/systems.