The ME2 is a rotary internal combustion engine with two opposing discs, each having a half-cylindrical chamber located around its perimeter.

An outer casing encompasses both rotary discs. Intake and exhaust ports and necessary engine controls are formed in outer casing. Pistons are formed in each disc. Half of each piston is connected permanently to one rotary disc the other half of the piston slides in the half cylindrical chamber of the opposing disc.

The pistons and cylindrical chambers develop varying volumes in each chamber, depending on the position of each disc and respective piston. These varying volumes perform different cycles common to four stroke piston engines. Mechanical devices allow the discs to rotate in only one direction. They also allow the disc to engage the output shaft in only one direction. From output shaft work can be derived.

In 1876 German engineer Nikolaus A Otto developed the 4 stroke piston engine a brilliant invention that has served the mechanized world very well.

Since then very little has changed. Until now, 129 years later the ME2 will replace the aniquated piston engine.