Blade construction for helicopter

Claim 1

IN A HELICOPTER HAVING A LIFTING ROTOR, A ROTOR BLADE CONSTRUCTION THEREFOR COMPRISING: (A) A SERIES OF HOLLOW SPARS OPERATIVELY CONNECTED TO SAID LIFTING ROTOR, AND FOR EACH SPAR; (B) A PLURALITY OF SEPARATE AIRFOIL-CONTOUR BLADE SECTIONS MOUNTED ON SAID SPAR ALONG A TRANSVERSE AXIS OF SAID SECTIONS FORWARDLY OF THE CENTER OF LIFT AND TOWARDS THE LEADING EDGE THEREOF, THE SAID SECTIONS RESPONSIVE TO THE AERODYNAMIC FLOW TO VARY THEIR RELATIVE INCIDENCE ANGLE; (C) THE SECTIONS ARE FREELY MOUNTED ON SAID SPAR AND CONSTITUTE A ROTOR BLADE; (D) FOR EACH SECTION, AN UPWARD AND A DOWNWARD PISTON ROD HAVING ONE END SECURED TO A COMMON POINT ON THE SECTION FORWARDLY OF THE SPAR AND TOWARDS THE LEADING EDGE OF THE SECTION; (E) A SUPPORT CORRESPONDING TO EACH SECTION AND FIXED TO THE SPAR FOR ROTATION THEREWITH; (F) A PAIR OF CYLINDERS SECURED TO EACH SUPPORT, EACH CYLINDER HAVING A PISTON THEREIN CONNECTED TO ONE OF THE PISTON RODS FOR THE CORRESPONDING SECTIONS; (G) TUBING INTERCONNECTING ALL CYLINDERS WHEREBY ALL PISTONS AND RODS ARE SUBJECTED TO THE SAME PRESSURE; (H) MEANS APPLYING PRESSURE THROUGH THE SAID TUBING AND CYLINDERS; (I) FURTHER MEANS ADAPTED TO CAUSE ROTATION OF SAID SPAR ABOUT THE LONGITUDINAL AXIS THEREOF AND TO CAUSE ROTATION OF THE CYLINDERS MOUNTED THEREON, WHEREBY AS SAID SPARS ROTATE A UNIFORM PRESSURE IS APPLIED TO ALL PISTONS FORCING THE AIRFOIL-CONTOUR BLADE SECTIONS TO ASSUME POSITIONS RESULTING IN EQUAL LIFTING FORCES ACTING THEREON; (J) A FLUID HOUSING IN SAID ROTOR TO THE UPPER END OF WHICH SAID TUBING IS CONNECTED; (K) A PISTON AT THE BOTTOM OF SAID HOUSING IN INOPERATIVE POSITION OF SAID ROTOR; (1) AN INERTIA MASS IN SAID HOLLOW SPAR PROJECTED OUTWARDLY BY CENTRIFUGAL FORCE AS SAID SPAR ROTATES ABOUT SAID ROTOR; (M) A CORD JOINING SAID MASS AND SAID PISTON WHEREBY AS SAID SPAR ROTATES ABOUT SAID LIFTING ROTOR, SAID PISTON IS RAISED IN SAID HOUSING TO INCREASE THE PRESSURE IN SAID HOUSING.