I have build a quad based on the TBS discovery frame.
APM 2.6 + external mag+gps (ublox m8) I get an Hdop of 1.4
After solving several issues on vibration and interference I can now fly quite stable in Stablized and Alt-hold modes. Position hold and loiter are however very unstable, they do accept my inputs but no where close to keeping the quad in place, the quad tends to move all around.
I have been through the log review wiki but I still do not know what to look for, specially in Position Hold mode. All things are within limits (vibration and compass interference).
Would someone please review the log files and guide me through this, I am really out of clues. The only Thing that I find a bit abnormal is the slight offset between AccX and AccY. Could this cause the problems?
I am posting 2 log files the last one also has a part of Position hold in which everything went wrong and the quad ended in the trees! I am also posting a tlog file. The tlog covers the duration of both flights performed on 2015-03-11
(during the first flight I do a save trim, land, disarmed and started over again )