Abstract: An electro-pneumatic dynamo includes a rotary engine having an engine casing, two rotors rotatably mounted within the casing having intermeshing blades and fluid medium inlet means for injecting a fluid medium between two intermeshing teeth of said rotors. The engine casing and blades are made of a non-magnetic material. The dynamo also includes a generator device composed of a plurality of magnetic rods, each of which is mounted in one of the teeth of the blades and a plurality of magnetic circuit elements mounted on the casing for cooperation with the rods. The circuit elements include a coil and a generally U-shaped magnetic bar having a base on which the coil is mounted and two ends between which the rods of one of the rotors passes upon rotation of the rotors so as to induce a flow of magnetic flux through the bar and thereby inducing an emf or current flow in the coil.