Originally Posted by HarryC

That is highly aerodynamically unstable and will produce a significant load on the servo. The aerodynamic centre is at 25% MAC (plus or minus up to 2% depending on section but most are clustered at or very close to 25%). If the tailplane is symmetrical then if the pivot is forward of that is stable in that it wants to blow back towards level, but if the pivot is behind 25% it is unstable and will try to move even further away from whatever position it is put in. So as soon as it moves away from an AoA of zero, the servo isn't trying to move it, it is trying to hold it back from flipping to a vertical position.