IMPROVED HELICOPTER BLADE WHERE THE HEAD HAS A SELECTED DEPORT COMBINATION IN THE ROTATION, CONICITY AND NEGATIVE SIDE DIEDER ANGLE IN ORDER TO IMPROVE FLIGHT PERFORMANCE

摘要

P THE INVENTION CONCERNS AN IMPROVED HELICOPTER BLADE. / P P THIS BLADE 14 INCLUDES AN ATTACK EDGE 24, A LEAF EDGE 26, A TALON 16 ASSEMBLED WITH THE HUB 12 OF THE ROTOR OF A HELICOPTER FOR ROTATING WITH THIS HUB AROUND A AXIS, A CENTRAL PART 18 WITH AERODYNAMIC PROFILE SELECTED AND A HEAD 20 EXTENDING ABOUT ABOUT 7 OF THE RADIUS OF BLADE 14, THIS HEAD 20 HAVING A DEPORT TO THE BACK DESTINED TO REDUCE THE SPEED OF THE AIR WITHIN THE MEANING OF ITS LOCAL ROPE, AS WELL AS A CALCULATED CONICITY SO THAT THE SIZE OF THE ROPE AT ITS OUTSIDE EXTREMITY IS AT ABOUT EQUAL TO HALF OF THAT EXISTING AT ITS INNER END. The invention is used to control the turbulence generated at the head of a helicopter blade and thus to improve the flight efficiency. / P