My question is, “How can I avoid a repeat?”
Log attached.
DVR review: While in loiter mode (116 ft altitude, 58% throttle), my quad went into RTL (116 ft, 58% throttle). I clicked into loiter. The throttle instantly reset to zero (111 ft). The quad fell like a rock. I pushed the throttle up (throttle 100%, 81 feet) but the quad continued to drop and roll. It hit the ground & immediately started climbing again (still in loiter mode, throttle still 100%). Then, it automatically changed to land mode (11 ft, 100% throttle), but kept climbing and was uncontrollable (throttle changed to 85%, then to 56% which was about where it was at when it went into RTL). The throttle then changed to 95% (I could have done this), then it automatically reset to 50% and stayed in land mode). It then crashed into a wall.
Replies
To avoid that, the best reflexe is to put your machine in stabilized mode and full throttle. All other modes are using sensors (like gps) that can send wrong info.
Thank for the reply, Max. That makes sense. I will preplan that protocol for the next exciting moment. The problem is the instant zero throttle setting. I need to find out what caused that and what will prevent it. It will take me several weeks to rebuild my quad, but I don't want to fly it until I can trust the Pixhawk again. I had this problem with the old 2.6. I thought it was fixed.