Manson engine

[1] Manson engines can be started in either direction (clockwise or anti-clockwise).

The front part acts as a displacer and the back part acts as a work piston (the displacer and the work piston move as a single component).

The engines are built mainly as desk toys, physics demonstrations, and novelties.

[3][5][8][2] The displacer and work piston of the Manson engine have zero phase angle.

[4] The valves and gas paths are considered by some to be complicated to manufacture, so various variants exist with improved, modified, or simplified valves and gas paths.

Animation
Photo
Drawing based on the original design [ 1 ]
ideal PV-Diagramm [ 6 ] [ 7 ]
Manson-Ruppel-Engine [ 9 ]