Abstract: The present invention relates to an aircraft ram jet engine for supersonic and/or hypersonic flight, intended to operate over a wide range of speeds.According to the invention, the ram jet engine comprises a ram jet engine body (5) including a combustion cheer portion (6) and a jet pipe portion (7), and, in the vicinity of the transition region (8) between the combustion chamber (6) and the jet pipe (7), having a changing geometry passing progressively from a convergent then divergent longitudinal section, for speeds corresponding to a low Mach number, to an at least substantially constant then divergent longitudinal section for speeds corresponding to a high Mach number.

Abstract: An aircraft ram jet engine for supersonic and/or hypersonic flight, intended to operate over a wide range of speeds, of the type including: (a) an oxidant inlet; (b) at least one fuel injector; (c) a body in which the oxidant and fuel intended to be burned are mixed and the gases resulting from this combustion are channeled; and (d) at least one wall of the body consisting, at least partially, of plates (12) linked together by articulations. The ram jet engine comprises first fluid blowing means (19, 22), mounted in the region of the articulations (13), in order to cool them.