Remote Magnetometer logic and connections

[BalsaBat]

My Skyview HDX installation is in a new composite airplane, with dual ADAHRS located below the baggage area and much too close (a couple inches) from the ferrous rudder cables. Now, before you condemn me for not reading the manual, let me say that I didn't install the ADAHRS-- it was done by a build center on a day that I must have been asleep. As it turns out, compass error is not great (but "liveable") with minor rudder inputs. Later, I found that big rudder inputs (which move the cable turnbuckles near the ADAHRS) makes it intolerable. I am also concerned about needing to watch for anything magnetic that might be put in the baggage area since the bottom of that is also a few inches away from the ADAHRS.

Although an ADAHRS move is probably best, to avoid changes to tubing, OAT cables, and other wiring, I am considering adding a remote magnetometer. My reading of the instructions is that I would need a hub (rather than another Y cord) to connect the remote magnetometer. The manual says with failure of the remote magnetometer, the system defaults to GPS. That leads me think that I would loose compass redundancy in dual ADAHRS system if I use a remote magnetometer. Is that correct?

Thanks
Ted

 

[Dynon]

Yes, that's right. One artifact of having the remote magnetometer is that it becomes the mag heading source (because it's correctly assumed that the ADAHRS on-board sensors are not good enough).

 

[BalsaBat]

Thanks. I'll get to work on an ADAHRS move!