Fuel control system for ramjet engine

Claim 1

IN A FUEL FEED SYSTEM FOR A RAMJET ENGINE HAVING A COMBUSTION CHAMBER AND INDEPENDENTLY OPERATING THRUST PRODUCING APPARATUS FOR LAUNCHING SAID RAMJET ENGINE TO A SELF-SUSTAININ SPEED, THE COMBINATION OF A FUEL TANK; A CONDUIT FOR DELIVERING PRESSURIZED FUEL FROM SAID TANK TO SAID COMBUSTION CHAMBER; A PILOT FUEL METER RESPONSIVE TO RAM AIR PRESSURE OPERATIVELY CONNECTED TO SAID CONDUIT FOR CONTROLLING THE FUEL FLOW THERETHROUGH AS A FUNCTION OF MASS AIR FLOW THROUGH SAID ENGINE; A MAIN FUEL METER RESPONSIVE TO FLIGHT MACH NUMBER AND AMBIENT AIR PRESSURE OPERATIVELY CONNECTED TO SAID CONDUIT IN PARALLEL FLOW RELATIONSHIP WITH SAID PILOT FUEL METER FOR CONTROLLING FUEL FLOW THROUGH SAID CONDUIT IN ACCORDANCE WITH A PREDETERMINED FLIGHT MACH NUMBER VS. FLIGHT ALTITITUDE RELATIONSHIP; AND AN AIR TURBINE DRIVEN FUEL PUMP OPERATIVELY CONNECTED TO SAID CONDUIT FOR PRESSURIZING THE FUEL FLOWING THERETHROUGH.