ORIGINAL: Taurus Flyer
Winglift
I think you use a digital “high torque” S3152 servo for elevator (second picture post 39).
Push and pull forces in the pushrod can be (with that lever on the servo of 10 mm(?)) about 5 a 6 kgf.
With these forces the servo will rotate a few degrees around the mounting screws I am afraid, so elevator position is depended of load (aero dynamical forces). I would prefer mounding in length direction.
It’s only an advice, maybe the servo never has to do that heavy job, but even then I always mount elevator, rudder and aileron (low torque!) servo’s in length direction for better positioning of the control surfaces.
See picture.
I wish you successful flights.
Cees
I think that you are right about that. I just installed it as described in the construction guide. I grabbed the elevator while cycling the servo and found that it took quite a bit of torque before the servo would move as you so correctly described, however it is very minimal. I believe that is because I just happened to install the servo with one side against the servo bay and since it is elevated a bit so that it clears the rudder servo it seems to be somewhat stable. I sure wish I could illustrate like you Cees! I could show you what I mean. The servo is secured ABOVE the hole for the servo any torque moves the body of the servo against one side of the plywood base. I think I will put small piece of plywood stick on the other side and try it that way as there is not much room to rotate the servo 90 degrees. Again, I wish that I could illustrate it like you, so here are some photos.