Boat propulsion means

Claim 1

IN A BOAT, PUMP MEANS FOR ESTABLISHING AN AXIAL FLOW OF WATER REARWARD, A COMPOSITE NOZZLE ADJACENT THE STERN OF THE BOAT COMMUNICATED WITH SAID PUMP MEANS AND RECEIVING SAID FLOW THEREFROM, SAID NOZZLE COMPRISING A RESTRICTED THROAT ADJACENT SAID PUMP MEANS COMPRESSING AND ACCELERATING SAID FLOW INTO A JET STREAM, A MANIFOLD INTEGRALLY CONNECTED WITH THE REAR OF SAID THROAT FOR PASSAGE OF SAID JET STREAM THERETHROUGH, SAID MANIFOLD BEING OPEN AND EXTENDING REARWARDLY BEYOND THE STERN OF SAID BOAT FOR DISCHARGE OF SAID JET STREAM SUBSTANTIALLY HORIZONTALLY REARWARDLY OF SAID BOAT CREATING THRUST FOR PROPULSION OF SAID BOAT, A PAIR OF VERTICALLY DISPOSED, REARWARDLY EXTENDING VANES SWINGABLY SUPPORTED BY SAID MANIFOLD, SAID VANES BEING SPACED APART A DISTANCE SUBSTANTIALLY EQUAL TO THE INTERNAL DIAMETER OF SAID THROAT, ADJUSTABLE LINKAGE INTERCONNECTING SAID VANES, MEANS FOR JOINTLY SWINGING SAID VANES FROM SIDE TO SIDE, SWINGING SHIFT OF SAID VANES LATERALLY DEFLECTING DISCHARGE OF SAID JET STREAM, REARWARD JET STREAM DISCHARGE FORWARDLY PROPELLING SAID BOAT, DEFLECTION OF SAID DISCHARGE RESPONSIVE TO VANE SHIFT EFFECTING A TURNING CHANGE OF DIRECTION OF SAID BOAT, AND MEANS FOR INTERRUPTING SAID DISCHARGE.