To: ShyTorque
Go to page 4 of this thread and several posts from the bottom is a post by Helisphere. Read that and then go to the top of this page and read my response to his post. Plain and simple, Flapping to equality is a term that is applied to Autogyros and it for some unknown reason has been carried over into the teaching of helicopter aerodynamics.
In the USA they teach that when the pilot pushes cyclic he creates an imbalance of lift across the disc. This imbalance is strongest over the left side of a counterclockwise rotor system. This perturbing force causes the disc to tip up over the tail and down over the nose. Aerodynamics initiated the force change but the actual movement was cause by the gyroscopic turning moment of the rotating disc.
If you look at retreating blade stall the cause and effect are the same. The left side of the disc is generating less lift than the right side. This imbalance will first cause the helicopter to roll left due to the disymmetry of lift and if you don’t catch it in time the disc will flap back or blow back pick one or the other. In either case you are dead or close to it.
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The Cat