Ramjet evolutionary geometry aircraft.

The invention relates to a ramjet for supersonic aircraft and / or hypersonic, designed to operate over a wide speed range, which has an inlet (4) oxidizer, an injection device (5) FUEL; And a body (3) ramjet THAT ONE PART comprises a combustor (6) and an exhaust nozzle (7) AND, MOREOVER, has at least in a transition area (9) between THE combustor and the exhaust nozzle, ALLOWING AN EVOLVING GRADUALLY GEOMETRIA modify its longitudinal section. According to the invention, said body (3) ramjet TAKES at least one opening CONTROLLABLE (11) SUSCEPTIBLE TO ESTABLISH WITH FOREIGN communication with said combustion chamber and allows introducing a stream of outside air into said transition zone 89) .