I do indeed mean the friction in the hub teetering assembly. The maintenance manual gives values of something like 0-1.6Kgs (units seem wrong but from memory this is what they quote) for acceptable 'pull off''.
If I am right about the units, its probably because its done with a spring balance, and they seem to be calibrated in Kgs.
I am talking about forward flight, and by balance I mean ball centred straight and level flight.
It may be a Yaw SAS problem, but I don't think it is. [Edited to Add Shytorque and I crossed posts, so I am not arguing with him]. The SAS APIs are pretty still during all of this and it seems to be worse on turbulent days, it reacts worse to turbulence than other same Spec 109s.
I am still interested if any Test Pilots can shed light on this as a general case, and not neccesarily the 109 specifically.
Cheers
Gary