The rudder on my Temptress is built up from sticks. Weight is less than half that of the Impact's (comparable size), and it's cg is nearer the hinge line. But I use the 8411 and it still oscillates on occasion. The oscillations only occur at neutral, never when te rudder is deflected. My pull cables are fairly loose so the transmission part of the equation may be affecting this outcome. I'll experiment with tigher cables but I believe the servo is the problem.
MattK
ORIGINAL: OhD
Right. Not only should we keep the rudder light, but we should keep the cg of the rudder close to the hinge line. I was wondering if one could "honeycomb" the CA furnished rudder, like folks were doing to wing cores and cover the openings with monokote or silk and dope and have a low weight stiff rudder. Might have to put foam between the portions of the skins that remain. Is that clear and does it make sense? Maybe one of the folks that built a balsa rudder would like to experiment.
Jim O