Abstract: An internal combustion engine in which the longitudinal center line of the cylinders are parallel to and equally spaced around the longitudinal center line of the engine.The pistons, working within said cylinders, are mounted on a swash plate mechanism, by means of which the reciprocating motion of the pistons is translated into the rotary motion of a carrier plate to which the said swash plate is mounted and, from which, is taken the drive into the vehicle transmission.Said swash plate is mounted on a post at the circumference of the carrier plate and pivots around said post when moved, on a longitudinal axis, by a mechanism.As each piston, in turn, passes the point on the swashplate adjacent to the mounting post, it is at the top-dead-center position in its cylinder. As said piston passes the diametrically opposite point on the swash plate it is at the bottom-dead-center position.