"Indeed, turned out my issue was two fold. Too high of throws on the TX and had "use airspeed sensor" enabled in the parameters. Fixed those, and autotuned with no issues. Nav tuning could still use some work. I really wish I would have rechecked…"
"Are you using the Airspeed sensor. If yes, and it is "enabled" make sure it is reading airspeed, had this issue with my FX-79, found my airspeed sensor was not reading, and was enabled, and in every Auto mode, it thought it was stalling, so it dove…"
"Yes, same design, with slight differenced. Either run 12v tot he camara side pin from your 3S, or follow the instructions above, and cut the trace to the proper pin, and wire in the 5V from the other side, along with ground. "
"An Update, a poster on the Arduopilot forums states that since the airspeed sensor is not reading (for some unknown reason) and that the use airspeed sensor option is enabled, that the autopilot may be trying to dive to recover from the stall.…"
"Yes, as a matter of fact, I did this again after the first incident during flight 1, thinking that may have been the issue.I have attached the Tlogs for reference. as stated previously, the plane seems to fly fine and maintain altitude in loiter,…"
"Mike, during flight have at least 8. The GPS error was right at startup, and cleared nearly immediately. Not sure on the compass, however. I don't think the compass should affect pitch control in auto mode."
"If you look at the actual log you will see that those popped up right at startup, then cleared. The compass was due to being too close to my car I think, not sure why GPS did that at first, most likely due to trees and my car being to the south of…"
"I have the exact same issue. I can still talk to the MimimOSD via FTDI, and have tried updating the firmware, but that does nothing. I've also tested the TX, thinking maybe that was the issue, but it works fine when connected to my DirectTV…"