Wing-tip mounted, pivotable jet power units on an aircraft

Claim 1

IN A VERTICAL TAKE-OFF AIRCRAFT COMPRISING A FUSELAGE HAVING WINGS EXTENDING THEREFROM, MEANS FOR MOUNTING A PLURALITY OF JET POWER UNITS ON THE WINGS OF SAID AIRCRAFT, EACH OF SAID JET POWER UNITS COMPRISING A PLURALITY OF JET ENGINES DISPOSED IN CLOSELY ADJACENT SIDE BY SIDE RELATION TO ONE ANOTHER IN A UNITARY CLUSTER BENEATH A WING TIP OF SAID AIRCRAFT, SAID CLUSTER BEING LOCATED AT A PREDETERMINED POSITION SPACED FROM SAID FUSELAGE THEREBY TO LEAVE THE AREA OF SAID WING BETWEEN THE ROOT AND TIP THEREOF SUBSTANTIALLY UNOBSTRUCTED, SAID MOUNTING MEANS INCLUDING MEANS FOR PIVOTING THE CLUSTERED ENGINES IN EACH OF SAID JET POWER UNITS, ABOUT AN AXIS OF ROTATION SUBSTANTIALLY PARALLEL TO THE TRANSVERSE AXIS OF SAID AIRCRAFT, FROM A GENERALLY HORIZONTAL TO A GENERALLY VERTICAL ORIENTATION FOR PURPOSES OF VERTICAL TAKE-OFF OF SAID AIRCRAFT, SAID MOUNTING MEANS AND PIVOTING MEANS BEING ADAPTED TO PIVOT SAID CLUSTER ABOUT SAID AXIS FROM A POSITION BENEATH THE TIP OF SAID WING TO A POSITION LOCATED IN FRONT OF THE LEADING EDGE OF SAID WING ADJACENT SAID WING TIP, WHEREBY SAID CLUSTER EFFECTS A DOWNWARD THRUST AT A POSITION FORWARD OF THE LEADING EDGE OF SAID WING DURING SAID VERTICAL TAKE-OFF.