The inventive rotary engine comprises a cylindrical chamber inside a casing wherein there is a concentric rotatable power shaft and a rotatable asymmetric main wheel mounted eccentrically enough as such to avoid contact with the wall of cylindrical chamber. Additionally two bars traversing the main wheel radially further having a wiping contact with the cylindrical chamber wherein one bar is fixed with power shaft and other bar is hinged with said power shaft. A combustion process is in action within a demarcated combustion chamber whereby the combustion chamber rotatably travels from a bottom dead volume to a top dead volume and hence a power, generated during this path of rotational travel, is subsequently available for delivery at the concentric power shaft.