Controls for vertical take-off aircraft

Claim 1

IN AN AIRCRAFT, A FORWARD JET THRUST NOZZLE SYSTEM PRODUCTIVE OF A RESULTANT THRUST VECTOR, A REAR JET THRUST NOZZLE SYSTEM PRODUCTIVE OF A RESULTANT THRUST VECTOR, MEANS ADJUSTABLY MOUNTING EACH OF SAID NOZZLE SYSTEMS TO VARY THE ORIENTATION OF ITS THRUST VECTOR IN A VERTICAL FORE-AND-AFT PRINCIPAL PLANE THROUGH THE CENTRE OF GRAVITY OF THE AIRCRAFT, THE THRUST VECTOR OF THE FORWARD SYSTEM TURNING ABOUT ON ORIENTATION CENTRE FORWARD OF AND LOWER THAN THE CENTRE OF GRAVITY AND THE THRUST VECTOR OF THE REAR SYSTEM TURNING ABOUT AN ORIENTATION CENTRE REARWARD OF AND NOT HIGHER THAN THE CENTRE OF GRAVITY: A CONTROL MEMBER MOVABLE FROM AN INITIAL POSITION THROUGH A FIRST RANGE AND THENCE THROUGH A SUBSEQUENT RANGE, AND A CONTROL SYSTEM LINKING THE CONTROL MEMBER TO THE NOZZLE SYSTEMS AND INCLUDING: MEANS RESPONSIVE TO THE CONTROL MEMBER BEING IN ITS INITIAL POSITION TO HOLD THE SYSTEMS WITH THEIR THRUST VECTORS DIRECTED SUBSTANTIALLY VERTICALLY UPWARDS, MEANS RESPONSIVE TO MOVEMENT OF THE CONTROL MEMBER FROM ITS INITIAL POSITION THROUGH THE FIRST RANGE TO ADJUST THE FRONT NOZZLE SYSTEM TO TURN ITS VECTOR FORWARDS UNTIL THAT VECTOR HAS A MAXIMUM MOMENT ABOUT THE CENTRE OF GRAVITY, WHILE PREVENTING THE REAR SYSTEM FROM BEING ADJUSTED SO THAT ITS VECTOR IS FORWARD OF THE VERTICAL, AND MEANS RESPONSIVE TO MOVEMENT OF THE CONTROL MEMBER THROUGH THE SUBSEQUENT RANGE TO ADJUST BOTH SYSTEMS SIMULTANEOUSLY TO TURN BOTH VECTORS FORWARDS UNTIL THE FRONT VECTOR IS SUBSTANTIALLY HORIZONTAL.