[burns]

1) cone has more hard and diffical mathematic function
2)modulation by cone is incorrect, because axis of cone equal axis of another plane. in example, it will be very strange if another plane is turning

Isn't the axis of the cylinder also equal to the axis of another plane?

Is the diameter of the cylinder constant for all aircraft?
If so, shouldn't it vary by aircraft size? IE, shouldn't a Zero's cylinder be smaller in diameter than a B29's?