A little help with a Futaba G190 Gyro

[Scamp62]

I have a shogun with a G190, and for the life of me I can’t get the tail to hold still.
It wants to drift (the nose) to the right, I have dialed in more gain, but it really has very little effect on the drift, any help would be appreciated.

[Danyboy]

Howdy!

I suspect the G190 is "normal" (=non-heading-lock), then my guess would be...

To mechanically adjust the linkage so the nose will hold still...

With normal gyros, only a change in angular velocity is detected and eliminated. With heading-hold (or -lock), the models relative position in space is being known and any deviation is being corrected.
With normals, you control the amount of thrust being generated by the tail, with heading-lock, you directly control the position of the tail.

So if you have a drifting tail with a normal, you need to adjust the input to the tailrotor either electronically or mechanically.
Minor drifting may occur since the gyro has a something one could describe as a "nullzone", which will make him ignore tiny-itty-bitty changes in angular-velocity (otherwise, your tail would be super-sensitive...).
With the gyro's gain, you will only modify the curve of the output, so the gyro's corrections for a given amount of angular-velocity can be tuned to be bigger or smaller, depending on the mass of the model (moment of intertia) and amount of thrust that can be produced by the tailrotor. (which would basically be: turn it fully up, and start tuning it down with test-hovering and -flighting until tailwagging is gone...)

Hoping to be helpful... ;)

Cheers,

Daniel

[darkside212]

Well put Daniel!

try adjusting the revo mix...sounds to me like your gain is set too high if the nose is drifting to the right