A quite complicated slipper bearing system was used in the Le Rhóne engine. The master rod was of a split-parts type, containing the 2 radial ball-races,
which permitted assembly of the connecting rods.
It employed three concentric grooves, designed to accept slipper bearings from the other cylinders connection rods.
The connecting rods used inner-end bronze bushes, which were shaped to fit in the grooves. The main rod carries eight pins, to which the other rods are attached.
To make it easier to understand, this animation shows the Stationary engine in which the motion is reversed. The crank shaft rotates instead of the whole engine.