Originally Posted by
mr_matt
OK I am confused, if that is what it does, that is what I was referring to as a "rate" mode. Meaning a deflection angle of the stick does not directly correlate to a deflection angle of a surface, but rather the deflection angle of the stick corresponds to a desired rotation rate around that axis (and the gyro takes care of any wind effect, turning, coupling etc)
So that is what my original question was. If you have a elevator compensation mix in for flaps, the gyro can't distinguish that from a down elevator rate command. Maybe you don't need these kind of compensation mixes in the first place with the rate mode.
This has confused me as well. While I've noticed that it seems to do a good job of maintaining a constant rate of rotation on the roll axis, I haven't noticed any problems with knife edge mixes, etc. I had rudder -> elevator, knife edge mix (about 5%) setup on the plane before I installed the Cortex, it's still enabled in the transmitter and the plane flies straight in knife edge whether the Cortex is enabled or not. I do however, still need to hold in rudder to maintain knife edge but I believe a bit less than without out it being enabled.
I also have limited experience with the Cortex in a Jet that has elevator compensation when the flaps get deployed and that doesn't seem to bother the Cortex either. Once we got the elevator trimmed for the desired glide slope, it didn't seem to change whether the Cortex was enabled or not. Whatever it's doing, it doesn't SEEM to be too worried about mixes, yet does a great of stabilizing the plane.