Abstract: Radial impulse engine, pump, and compressor systems and assemblies are disclosed herein. In one embodiment, an assembly includes a first end wall portion spaced apart from a second end wall portion to at least partially define a pressure chamber therebetween. In this embodiment, the assembly also includes a plurality of movable wall portions disposed between the first and second end wall portions. Each movable wall portion includes a cylindrical surface extending at least partially between a distal end portion and a pivot axis. In this embodiment, the assembly further includes a power take out member operably coupled to the distal end portion of each of the corresponding movable wall portions.