mechanisms of a two stroke cycle opposed piston engine such as the engine 8 of fig1 the graph shows wristpin to sleeve clearance for the j 1 j 1 u2032 interface and j 2 j 2 u2032 interfaces as a function of the crank angle position in degrees of the one of the crankshafts to which the coupling mechanism connects its associated piston the graph shows a full cycle of crankshaft operation with the understanding that this represents the operational cycles of each of the two crankshafts seen in fig1 with or without a phase difference further the graph is representative of the two stroke cycle operation of the opposed piston engine of fig1 this graph is based upon load transfer occurring at 0 u00b0 tc and 180 u00b0 bc although this condition should not be considered to be limiting at a crank angle of 0 u00b0 with the piston at tc the compressive load is about equally divided between the j 1 j 1 u2032 and j 2 j 2 u2032 interfaces as the crank angle advances the load is increasingly received by the j 1 j 1 u2032 interface while the j 2 j 2 u2032 segments begin to separate at a crank angle of 90 u00b0 the compressive load.