I built the a big heavy lift that I have been posting about on here using a Pixhawk. Before i put it in the air i wanted to experiment with something smaller so I built a hex with a ardupilot. 2212-920 motors multistar 20a slim and n8m gps. Got it in the air first try with just a lot of drifting in stable, althold and also in loiter. So I set channel 7 for trim set and proceeded to trim it out until it flew pretty steady in stable and althold. from alt hold I set it down and set trims, zeroed my rx trims. Then took off again. flew pretty steady. Put it in loiter and it started to fly strait up and no throttle control helped. So I flipped the RTL switch and it immediately shut down the motors and fell back to earth-at least it landed!! Probably 30-40 feet up.
Ill ber putting it back together tonight; Not a lot of damage, just a couple of bent aluminum motor mounts but who knows what unseen damage is there.
Everything was balanced.
I have been using Naza and P2 so this is my first apm/pixhawk and I want to learn it well before I try to but my big one in the air!
Any ideas? I did hear one or more of the motors race a little a couple times when I was re-positioning it while trimming.