Aircraft rotor-propeller

Claim 1

FOR USE IN AN AIRCRAFT ROTARY THRUST PRODUCING DEVICE OF THE TYPE INCLUDING A PLURALITY OF GENERALLY RADIAL BLADES ATTACHED TO A HUB FOR ROTATION THEREWITH, THE COMBINATION COMPRISING AN ELONGATED BLADE BODY, A FLAP CONNECTED WITH SAID BLADE BODY FOR MOVEMENT ABOUT A DEFLECTION CHANGING AXIS RELATIVE TO SAID BODY TO CHANGE ITS DEFLECTION WITH RESPECT TO SAID BLADE BODY, A PUSH-PULL ROD EXTENDING GENERALLY LONGITUDINALLY OF SAID BLADE BODY, AND A MECHANISM CARRIED BY SAID BLADE BODY AND CONNECTED WITH SAID PUSH-PULL ROD, SAID MECHANISM INCLUDING MEANS FOR TRANSMITTING THE MOTION OF SAID PUSH-PULL ROD TO SAID FLAP TO CONTROL THE DEFLECTION OF THE LATTER AND FOR EXERTING A CENTRIFUGALLY DERIVED FORCE ON SAID PUSH-PULL ROD WHICH FORCE OPPOSES THE SELF-INDUCED CENTRIFUGAL LOAD ON THE LATTER ROD AND THEREBY REDUCES THE RESULTANT FORCE NECESSARY TO HOLD SAID ROD IN A GIVEN POSITION DURING ROTATION OF SAID BLADE BODY.