Tuning advice for massive, asymmetric heavy-lift drone + overcurrent issue

[xfacta (Shawn)]

I would use the Octa-Quad X frame type.
Review this in regards to your wiring, you probably have very long wiring runs so all this will be relevant. I would say this is related to the ESC shutdowns. Add capacitors at the ESCs too.

Grounding issues

Good find Mark! ESC grounding issues are made up 3 forms of ESC signalling/coupling problems, resistive, capacitive and inductive. All three should be considered when building an aircraft. Inductive: This is the tendency for sudden changes in current to cause large voltage spikes in your system. Inductance in your power system is primarily caused by the size of the loop formed by the positive and negative leads between the esc and battery. So the longer the cables to the ESC the higher the in…

Use the MissionPlanner Initial Parameters calculator to check everything is set OK.
Set and test the transmitter (throttle) and battery failsafes, plus set FENCE_ENABLE,1