Thread: Discussion Control for twin rudders?
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Old Oct 05, 2012, 11:49 AM
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The 'Wack, BC, Canada
Joined Oct 2002
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Like you suspect I think that the elevators are simply too shallow an angle for good rudder response. Also you'd have the fixed fins fighting to "correct" for the yaw produced by the ruddervators which would further reduce the yaw effectiveness.

The idea of tensioning the rudders and then using pull only lines is a good idea for a model of this size and flying speed. You want to arrange it so that the spring or rubber tensions are opposing each other so that when the lines come together at the servo or bellcrank arm that they are balancing each other and the servo doesn't see much spring force. Otherwise it'll load up the servo needlessly.
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