Patent ID: 7000398

Claim:
A ramjet having an elongate body, the ramjet comprising: at one end of said body, an inlet for a stream of oxidizer; at an intermediate part of said body, a combustion chamber which is provided with at least one fuel injector and in the heart of which the oxidizer and fuel mix and said mixture is burnt, the wall of said combustion chamber consisting at least in part of an inner skin arranged on the same side as said heart and an outer skin spaced away from said inner skin forming therewith an intermediate space and said fuel supplying said injector passing, at least in part, through said intermediate space to cool said wall; and at the other end of said body, an exhaust jetpipe ducting the combustion gases leaving the heart of said combustion chamber, wherein: said inner skin is made at least in part of a thermostructural composite, which is porous to said fuel passing through said intermediate space; the porosity of said inner skin is set so that the proportion of said fuel passing through said inner skin is between 5% and 15% of the total amount of fuel supplied for said ramjet; said outer skin is made of a thermostructural composite that is sealed against liquids and gases; and said inner and outer skins made of thermostructural composite are adjoined together by a plurality of threadlike spacers of thermostructural composite passing across said intermediate space.