ORIGINAL: opjose

Yes it has a major affect when landing. Though you have the "force" backwards see below...



On my Giant UCD, when I followed the directions, the first "step" of the servo caused the elevator to deflect about 1/4" or more.

That is a LOT of elevator movement, and would cause the nose to pitch up, when I want far less movement up.

Once I set things up for maximum mechanical advantage, the first "step" causes the elevator to barely move 1/16th", which gives me better control.

To compensate for the lower resulting movement of the elevator to it's very extremes, I set my TX to permit 150% movement of the servo.

In other words the servo now travels further to obtain the same movement from the tail as before....

So I have finer control of the surfaces.


Note: A SHORTER horn produces LESS stress and torque on the SERVO too, so it is better for aerobatics and 3D.


The servos fight blow back better as well.

The horn acts as a "lever" so the longer the lever is, the more force the control surface can put on the SERVO.

When you go for maximum mechanical advantage, you shorten the control horns, and lengthen the control linkages on the surfaces ( within reason)

That way there is a lot of torque on the control surface, not on the servo.



So what's the drawback?

The surfaces take a longer to move from one extreme to another since the servo must turn more... however with most servos you would never notice this anyway... and if you did, you could merely use a higher speed servo. Unless you were engaged in competitive or pattern flying, this should not be an issue.