Thank you for response xokia.

Hopefully Zexx can answer the rest of the questions, then maybe your request with rudder delay will be solved too.

1) If you can observe extremely fast oscillations then Rudder Delay is likely too high. In range of 0 - 3 you will rather not notice any difference.
3) Yes, it is all described in the manual and also when you will hover mouse cursor above a parameter.
4) If Governor is reacting too agressively then it has a negative impact on the tail. So if gains are too high, it will cause tail to perform poorly, since motor is making a bigger kicks.
I would set a higher RPM, maybe 3000 RPM.

3) You are right, but in a normal circumstances it is not needed. Especially if the model is built correctly according the manual.

Can you observe a tail hunting during hovering when there is no wind? This is good thing to check. If it is apparent, then the mechanics is still not moving smooth enough.

I am afraid, but KST 215 is not designed as a tail servo. Even that speed is good a slower tail servos could perform better.

Rudder Delay can't be configured according servo speed. Each servo is different and require a different values. Even if the speed is very same, the values could differ a lot. So that model can fly well and other can oscillate badly in fast forward flight.

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Spirit System developer

Thank you for your response.

There is no tail hunting during hover and my tail servo is not a KST215 its a MKS HV93i.
Thank you also for clarification of rudder delay, at least i now know at what to look at with a bit detail.