Dave
>The camera is rigidly attached to the fuselage and is located directly below the mast. It is therefor on the mast axis (i.e. 'rotor hub plane').
the only way the mast axis is the same as the hub plane when cyclic input is put in, is a ridgid rotor head.
the coning is increased only when collective is applied after original dissplacment of the cone with cyclic.
to see the circle of light the camera MUST be directly under the blade tip path. not the mast.