Hello,
I would like to buy APM 2.5 for my Raptor FPV platform (fixed wings), but theres one thing what does disturb me.
Raptor (also bixler and most of pushers) does have battery tray at front, and motor/esc in middle of fuselage. It does mean theres need to lead main power wires throught all cargo bay, also quite close to APM board.
My motor/esc esc does take up to 50Amps and that disurb me a bit.. how onboard magneto sensor will react for that, and what influence it can have for inflight behavior ? It would be really bad to see airplane flying in totaly wrong directionin RTL mode because false magneto readings caused by magnetic field from power cables... thats why i prefer to ask first.
Im careful on this field as i had really HUGE problems with that in some "expensive quad setup". Copters generally are bit difficult in that matter, theres no too much space for separation. In effect i had really serious problems in RTL behavior because wrong magneto readings.
Greg
Replies
It will react to the current.
Especially when the high current wires are close to the APM.
you really want to put in some distance between them.
I fly the bixler with the current wires 5 cm away from it and when I throttle it up to the max the compass will get a offset of 10-20 degrees.
If you install the latest version of arduplane you don't have to worry about flyaways because it has built in detection for large magnetometer offsets.
If it detects a large offset between GPS and magnetometer direction it will switch to GPS navigation alone.
But if you still having doubts I suggest adding an external magnetometer and placing it on the vertical stabiliser. This will involve modifying your APM board (a trace needs to be cut) and adding a line in the code in arduino,