To: Crab
First of all we have to get on the same piece of paper. In this discussion I will not address the Lynx or the Robinson because of their respective offsets (Lynx 15-degrees and Robinson 18-degrees). I will not address swashplate position; instead I will address cyclic stick displacement, as this is uniform on all helicopters where swashplate displacement is not.
First lets address the Bell. If the blades are displaced in line with the lateral axis and the cyclic stick is moved forward the blade at the 3:00 position will be at the minimum pitch angle. The blade at the 9:00 position will be at the highest pitch angle. Gyroscopic precession will tilt the disc down over the nose and up over the tail. (If you don’t agree with gyroscopic precession you can use your own terminology). If the blades were disposed over the longitudinal axis and the cyclic stick was moved forward or backward the blades would not change pitch. If the blades were disposed over the longitudinal axis and the stick was moved to the right the blade at 12:00 would be at its’ highest pitch and the blade at 6:00 would be at its’ lowest pitch. The opposite would be true if the stick were moved left.
Now for clarity’s sake I will use a four-blade rotor system turning counterclockwise in this illustration. With the blades disposed over the lateral and longitudinal axes of the helicopter and the cyclic was moved forward the blade at 3:00 would be at its lowest pitch and the blade at 9:00 will be at its’ highest pitch. The blades at 6:00 and 12:00 will reflect the collective pitch setting. If the cyclic were moved to the right, the blade at 12:00 would be at its’ highest pitch and the blade at 6:00 would be at its’ lowest pitch. The blades at 3:00 and 9:00 would reflect the collective pitch setting.
All of this is allowed by the lead angle of the pitch horn and the tilting of the swashplate in respect to the direction in which the cyclic stick is displaced.
With all of this in mind, you are free to go back to the “drawing board” and rethink your post.
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The Cat