Gpro tail settings

[Nitro Head]

I have a Gpro on my 600n and it generally flies quite well, however the tail seems to have a stepping feel to it.

With a small constant rudder input, a slow pirouette or gentle turn for example the Heli rotates in 5-10 degree steps, gives the impression of 50p piece in a gentle turn.

having come from FBL with just a single gain parameter I now have numerous parameters to play with.

Tail piro Rate. 100
Rud Gain 80
Rudder Expo. 50
Rud dead band 5
Tail acceleration 55
Rud Right stop 20
Rud Left stop 20
Rudder P Gain 80
Rudder I Gain 60
Collective to tail 22
Cyclic to tail 9

values shown are the defaults that I am using, are any of these obviously wrong for a 600 class Heli?

i have a reasonable understanding of the theory of these parameters but not sure what to adjust for this stepped response?
Almost seems like it has too little gain but anymore and tail oscillates in fast forward flight.

thanks,

[coolice]

Evening Mate.

One of the first questions to ask is if your tail mechanism is smooth and without any stickyness in it's full range of movement? If it's a bit tight this can cause problems, as the tail servo cannot input small corrective movements and then when it does try to make small corrections it then goes too far and over-compensates.

If the above is all ok I would try lowering your I gain a bit, as this parameter can give inconsistant piro rates if it's set too high off the top of my head.
I've been lucky with 99% of my tail gyros and not needed to play too much with these P & I gains, what length servo arm are you running out of interest?
.

[Nitro Head]

Hi Ian,

Thanks for your reply, I have checked the tail mechanics as I had the same thoughts as you however it is silky smooth.

The ball on the servo horn is 14mm from centre, the neutral point is set correctly (hands off in rate mode) guess it's time to start playing with the settings?

Thanks,

Paul.