How strong is the slip-coupling on the aileron servo?

[NicoN]

Sorry for my english ...

We have a weird autopilot problem (it is a Century 21 and we have 2 Gi 275 installed)

in the hangar i can do the ground test, moving the heading bug to the left or right and the yoke is moving also.

Do it with a small heading change, the yoke moves slowly, with large heading change (60° elft or right) the Ykoe moves faster - seems perfect.

As soon as we are in the air, the heading mode has no effect anymore, the plane does not follow the commands.

in nav mode the aircraft turns correctly.

 

I can hear the motor running continously with the hdg bug set to somewhere (not in the middle).  I opened the cover and can see that the aileron is running to the max position and then the motor seems to continue.

What is weird: I can move the aileron easily with almost no power by hand and I can see the sliüpping process.

My question: How much power is normal? I know, it is possible to override the motor but taht easy?

 

 

Edited August 21, 2023 by NicoN

[Oscar Avalle]

Nico
 

I had a similar problem with my Stec55x. Navmode worked great but hdg… not. I solved it by reworking all the harnesses. It seems it was a bad connection.

 

btw on the ground it worked well

let me know how it goes

 

oscar

[Fly Boomer]

5 hours ago, Oscar Avalle said:

I had a similar problem with my Stec55x. Navmode worked great but hdg… not. I solved it by reworking all the harnesses. It seems it was a bad connection.

 

btw on the ground it worked well

That's a great post!  Sounds like the identical problem, and it's complete with a solution.