"He was referring to APM.
However, PIXHAWK is indeed becoming insufficient already - a faster CPU and especially a second core would be very helpful in terms of being able to do what Paul wants to do with the EKF. Copter is currently struggling to…"

"It looks like the tabs on the battery failed, rather than the solder.
I think 3DR knows about this issue, but in the meantime I would suggest gluing the batteries down."

"affiliatemarketingisfun.com :)"

"I'm guessing there's an issue with serious compass noise because the compass is on top of the 3-phase wires to the motor. You also have a massive Z offset - must be something magnetic nearby.

Lifting that compass up a few centimeters and…"

"Do the following checks:- Point the FRONT of the copter towards NORTH. X magnetometer should be BIG POSITIVE. Y magnetometer should be small.- Point the FRONT of the copter towards WEST. Y magnetometer should be BIG POSITIVE. X magnetometer should…"

"Could've been vibration issues. Heading looks good in this log, although you were facing one direction the whole time so it isn't a real test..."

"There's either something up with your compass or you have vibration issues - can't tell without IMU logging.
I don't see anything blatantly wrong with your compass. The compass heading looks bad, but that could be because the roll and pitch are out.…"

"This thread is from 2011.

Check your min and max throttle settings, as well as your radio calibration."

"Hi there,
The disarm gesture is throttle down+yaw left. If you were inputting a roll or pitch command, it is not surprising that the copter flipped on the ground."

"Your understanding of THR_MID is your problem, then. Your stick must be centered regardless of the THR_MID setting. The THR_MID setting applies a throttle curve during direct throttle control modes. Graph CTUN.WPAlt and CTUN.ThrIn
Your vibration…"

"Your stick is below center at almost all times in your log."

"I'll add it to my todo list - in the mean time, it sounds like setting your WPNAV_RADIUS to something within the documented range would be prudent?"

"Post it to the support forums at http://ardupilot.com/forum"

"Hi there, sorry about that. Where is this log?"

"Only for processors significantly faster than the AVR on APM2."

"Surging motors would be caused by the THR_ACCEL_* parameters. A steadily descending copter would be caused by not having the stick centered. Descents during fast flight are caused by air movement over the copter, this is normal and there's no way to…"