To: HeliEng
I believe you already know of my opinions regarding Robinson helicopters but I would like to make this comment about the R44 Raven. The installation of servos in the flight control system was in my opinion to counter the feedback forces emanating from the rotorhead mainly due to centrifugal twisting forces and cyclic pitch change of the blades as they rotate. This in itself is good. However, if the upper flight controls were not modified to withstand these trapped loads the reliability of the upper controls will be adversely effected.
------------------
The Cat