quote:

ORIGINAL: abufletcher

Standard modeling practice, particularly on larger models, recommends against attaching control cables directly to servos. The standard solution then is to use a bellcrank setup. One bellcrank for the rudder and another for the elevator(s). So here's the point I'm getting at: You can kill two birds with one stone, if you just think of the rudder bar and/or joy stick as scale "bellcranks" with scale cable runs...which on a large model will also probably be the most effective locations.

So if you just attach the rudder cables to the rudder pedal, as per the original, and then drive the rudder pedal as you would a bellcrank with the servo, there shouldn't be any problems. I don't see how this would be any riskier than using a non-scale bellcrank. The joy stick is a little trickier because normally it has movement along two axes. While I've seen setups where this two directional movement is maintained, I would agree that it adds complexity and thus increases risk. But a joystick that only moves in one direction (backwards and forwards) would, again, be no different from a normal bellcrank.

In short, my point is, that if you are going to use bellcranks anyway to operate the control cables, why not make them "scale bellcranks" by using your outstanding rudder bar and joystick?

quote:

ORIGINAL: TKFOKKER
Some small progress to the control column.