ORIGINAL: Taurus Flyer
My argument
Each servo of the two has to withstand a part of the lift force especially in situation with high G-forces (loops).
To keep his position each servo will use electrical power from the battery for that.
Not when using 1 servo.
Mark:
7) This is not much of an issue with quality servos and careful setup. It does require proper setup, though.
My argument
Servo 1 has to go against the lift force, servo 2 is helped by the lift force! See point 3
Cees
3) Ah, I see what you are getting at. Fair enough, it will take power to do that. I don't know if that is a big issue with radio gear these days, but the servo will have to do more work.
7) That is a quality issue with the servos. Digitals are especially good at holding position against loads like this. Given the flexibility of the torque rod system, I bet the one aileron deflects noticeably less due to this loading difference, too.
As you say, it does boil down to which you prefer. I will take the stiff linkage and easy adjustability of dual servos while you prefer the simplicity of a torque rod system. And we will both be happy with our choices and the models will all fly just fine...
Mark