Take-off and landing strip

Claim 1

A SURFACE FOR THE LANDING AND TAKE-OFF OF AIRCRAFT COMPRISING A YIELDABLE BASE STRUCTURE, A GROUP OF BLOCKS FORMED OF SUBSTANTIALLY RIGID MATERIAL EXTENDING TRANSVERSELY OF SAID SURFACE AND SUPPORTED ON SAID BASE STRUCTURE, SAID BLOCKS HAVING ADJACENT FACES WHICH ARE SUBSTANTIALLY FLAT AND VERTICAL AND HAVING UPPER EDGES WHICH COOPERATE TO PRESENT A SUBSTANTIALLY FLAT RUNWAY SURFACE, A COVER SHEET EXTENDING OVER THE SURFACE FORMED BY SAID BLOCKS, A PRESSURE MEMBER POSITIONED ADJACENT ONE END OF SAID GROUP OF BLOCKS, ANCHOR MEANS LOCATED ADJACENT THE OTHER END OF SAID GROUP OF BLOCKS, CABLES EXTENDING THROUGH OPENINGS IN SAID BLOCKS AND ATTACHED TO THE PRESSURE MEMBER, AND HYDRAULIC MEANS LOCATED ADJACENT SAID ANCHOR MEANS AND OPERABLE TO PLACE SAID CABLES UNDER TENSION TO CLAMP THE BLOCKS TOGETHER AND PRESENT A RIGID SURFACE FOR THE TAKE-OFF OF AIRCRAFT, SAID HYDRAULIC MEANS BEING OPERABLE TO RELEASE SAID CABLES AND SAID BLOCKS BEING INDIVIDUALLY MOVABLE TO PROVIDE A YIELDABLE SURFACE FOR THE LANDING OF AIRCRAFT.