bugdevheli
8th May 2009, 20:32
Could someone tell me if the blades on a gyro are attatched at the same percentage of chord as a helicopter blade ie 25% from leading edge. thanks Bug
DeltaFree
8th May 2009, 22:03
I am no expert on autogyro blades, but 25% chord is the aerodymanic centre of pressure for an aerofoil. In simple terms an aerofoil with no camber will have no rotational moment about this point, so if mounted at this point there will be no twisting force on the blade. If the blade is cambered the twisting moment will be constant with changing incidence but will increase with airspeed.
So logically, mounting at 25% chord would seem an obvious thing to do.