Turbojet engine and its operation

Claim 1

A COMBUSTOR COMPRISING, IN OPERABLE COMBINATION, AN ELONGATED FLAME TUBE OPEN AT ITS DOWNSTREAM END, A FUEL INLET MEANS ADJACAENT THE UPSTREAM END OF SAID FLAME TUBE, SAID FUEL INLET MEANS HAVING AN OPENING NEAR THE INNER WALL OF SAID FLAME TUBE AND BEING ADAPTED TO ADMIT AN ANNULUS OF FUEL IN A DOWNSTREAM DIRECTION ALONG THE INNER PERIPHERY OF SAID FLAME TUBE, MEANS FOR ADMITTING AIR ADJACENT SAID UPSTREAM END OF SAID FLAME TUBE, THIS LATTER MEANS BEING ADAPTED TO INTRODUCE AIR AS A HELIX ALONG THE AXIS OF SAID FLAME TUBE AND WITHIN SAID ANNULUS, AN OUTER ELONGATED TUBE DISPOSED CONCENTRICALLY AROUND SAID FLAME TUBE IN SUCH A MANNER AS TO PROVIDE AN ANNULUS THEREBETWEEN THE UPSTREAM END OF SAID OUTER TUBE EXTENDING IN AN UPSTREAM DIRECTION BEYOND THE UPSTREAM END OF SAID FLAME TUBE, A PLURALITY OF VANES IN THIS LATTER ANNULUS INTERMEDIATE THE OUTER PERIPHERY OF THE INLET END OF SAID FLAME TUBE AND THE ADJACENT INNER WALL OF SAID OUTER TUBE, THE AXES OF SAID VANES BEING MUTUALLY PARALLEL AND DISPOSED AS HELICES IN SAID ANNULUS INTERMEDIATE SAID TUBES, A SEGMENT OF SAID ANNULUS INTERMEDIATE SAID TUBES BEING OPEN AND THE REMAINDER OF SAID ANNULUS BEING CLOSED AT THE DOWNSTREAM ENDS OF SAID COMBUSTOR, AND AN ANNULAR CONSTRICTION AROUND THE INNER SURFACE OF SAID FLAME TUBE INTERMEDIATE ITS ENDS AND DOWNSTREAM FROM THE POINT OF INITIAL CONTACT OF SAID FUEL AND SAID AIR IN SAID FLAME TUBE, SAID SEGMENT OF SAID ANNULUS BEING ADAPTED FOR PASSAGE OF GAS FROM SAID ANNULUS.