To: Grisoni
Adding right cyclic in countering Zero G will result in adding to the Right roll component of the tail rotor resulting in loss of control. These are not my words, they are the words of Robinson Helicopters.
The same is true for the warning about not trying to counter the right roll by pulling the cyclic back and to the left as this would cause high flapping angles resulting in blade / fuselage contact.
The purpose of the illustration was to show first of all the relationship of the neutral position of the cyclic stick relative to the allowable travel. The illustration also shows the rigged neutral position of the cyclic stick in relation to the neutral travel position and third, the illustration shows the line the cyclic must travel in order to compensate for the 18-degree offset of the swashplate to allow forward flight.
I was not trying to imply that the cyclic stick must be at the extremes of travel in order to counter Zero G. I was implying that the stick if moved on the lines shown would have the result indicated in the applicable blocks.
Regarding the use of a plotting board , that was a question in my report. Mr. Robinson did not reply to that question. So, I will raise it again. Was a plotting board used during the certification? If it was, did they discover the points made in the Cyclic Control Diagram which is the subject of this post.
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The Cat
[This message has been edited by Lu Zuckerman (edited 10 December 2000).]