Abstract: A rotary internal combustion engine including a rotatable blade driver mechanism including a shaft, a cam coupled about the shaft, a plurality of annular blade drivers coupled to the shaft, and a plurality of extendable compression blades slidably disposed through the blade drivers; and a casing generally encompassing the blade driver mechanism, the casing including a plurality of concentric side walls projected therefrom to create an annular compression chamber and an annular combustion chamber and further including a plurality of annular blade guides extended therefrom and with the blade guides slidably secured to the compression blades and the combustion blades for controlling their extension within the compression chambers and combustion chambers when the driver mechanism rotates.