FIELD: engines and pumps.
SUBSTANCE: invention relates to an engine used in the aerospace field. Engine has two modes of operation: air breathing and rocket, that may be used, for example, in an aircraft, flying machine, or aerospace vehicle. Engine efficiency can be maximised by using a precooler arrangement to cool intake air in air breathing mode using cold fuel used for the rocket mode. By introducing the precooler and certain other engine cycle components, and arranging and operating them as described, problems such as those associated with higher fuel and weight requirements and frost formation can be alleviated.
EFFECT: invention provides an increase in speed when entering orbit, an increase in payload.
30 cl, 7 dwg
