Nozzle tube construction

Claim 1

A SUBSTANTIALLY ANNULAR WALL CONSTRUCTION FOR A ROCKET IN WHICH THE WALL VARIES IN DIAMETER FROM END-TO-END INCLUDING A SET OF FIRST AXIALLY EXTENDING TUBES EXTENDING SUBSTANTIALLY THE FULL AXIAL DIMENSION OF SAID WALL AND BEING ARRANGED IN A RING TO FORM THE ANNULAR WALL, SAID TUBES AT SMALLER DIAMETERS OF THE WALL BEING IN SIDE-BY-SIDE CONTACTING RELATION AND BEING SPACED APART CIRCUMFERENTIALLY AT LARGER DIAMETERS OF THE WALL TO FORM A SPACE BETWEEN ADJACENT FIRST TUBES AND A SET OF SECOND AXIALLY EXTENDING TUBES POSITIONED BETWEEN THE FIRST SET WHERE THE TUBES OF THE FIRST SET ARE SPACED APART WITH EACH OF SAID SECOND TUBES ABUTTING AND JOINED TO ADJACENT TUBES OF SAID FIRST SET THROUGHOUT THE FULL SPACE BETWEEN ADJACENT FIRST TUBES AND WITH EACH TUBE OF THE SECOND SET MERGING WITH AN ADJACENT TUBE OF THE FIRST SET TO FORM A SINGLE FLOW PATH FOR COOLANT THROUGH THE ADJACENT TUBES.