Servo arm size with the Outrage

[72mhz]

I recently replaced my gyro with a Quark Outrage and I replaced the factory tail servo for a 5084mg. I used the old servo arm as a guide as to where I needed to placed the ball link. When I went to set the outer limits on the travel with the gyro, I couldn't get the full throw on either side of the tail slider. I then went back and moved the ball link out one hole and the gyro adjustment will almost get the slider to either side. Should I go out one more hole on the servo arm? As of right now, the gyro settings are maxed out and the servo can't get in a bind. I didn't now if it would allow the gyro to do less work with a longer ball link position, there for be more accurate if I have more travel instead of less.

Thanks for your comments.

[Angelos]

Are you aware that the servo momentarily pauses at 100% when setting the endpoints? If you hold the stick a bit longer it will start moving again.

-Angelos

[72mhz]

Yes....
I move the rudder stick to the left and it stops and then starts back again but I'm still not at the endpoints of the slider when it completely stops...either side when adjusting.
That is why I was wondering if moving the ball link out even further was better so the gyro wouldn't have to work so hard making the servo arm get to the end points. Short arm/ball link = more servo arm travel vs longer arm/ball link out further = less servo travel.

Thanks for the reply and suggestion.

[Angelos]

When you have a shorter arm the servo will need to move more. This means that a larger correction is needed from the gyro. However, the gyro will respond equally fast in either case. This is because the shorter arm will result to a higher gain. Here is how it works:

The gyro does calculations and outputs the result which then drives the servo. The gain is a scaling factor for gyro's equations and thus the larger correction will be produced due to the higher gain. This process takes exactly the same time; the only difference is that the result is larger.

The gyro does not see any increased workload or take longer to respond. However, the servo does. There is further guidance in the user guide and our FAQs on how to select servo arm lengths etc. Also note that some helis offer far too much tail pitch which is not needed and sometimes it can cause problems (tail rotor looses efficiency when the pitch is opened too much at low yaw rates).

-Angelos