Dennis, your videos are a lifesaver for me. I was wondering if you by chance knew anything about this. I have asked many different people and sites to no avail.
I am the pilot for a video production company, and they just had an F450 custom built. The first time I took aff, an arm broke off at the motor mount and it crashed to the ground breaking the GPS mount and 2 of the 12" props that came with it. I replaced all of the arms and did not disconnect any wires. I remounted things exactly the same. I zip-tied the GPS straight up and down and it consistently gives me an HDoP of 1.5 (mount broke at the base. Pole was fine) These last few times that I have flown it, I have had a very peculiar problem.
I was testing the autopilot on a simple flight that had a circle WP, a loiter WP, and then another WP which triggered RTL. After the circles were completed, the quadcopter seemed to be flying to its next WP fine, but then it drifted down from 25' and bounced up off of the ground pretty hard. It seems like the throttle just wasn't enough. I then landed it and took off in loiter. I hovered 15 feet off the ground and after a minute it slowly came down and bounced back up. I put the throttle at full and it never responds.
I can share the few log files that shows what happened. On that logged flight, I just tried to hover and see how long it would last. Almost, every time at the minute mark of being in the air, it begins a slow descent, but it bounces back up like it is trying to fly. I have not had this long enough to familiarize myself with analyzing the logs. This is not good and very dangerous. Thank you for any help!
RCxHobby 2814-700kv motors
Not sure what the ESCs are because they are black heat shrink wrapped (I was told they were upgraded)
3dr 915 mghz telemetry
Tarot 2d Gimbal
Turnigy 4000 mAh 4s Battery
3dr BEC Power controller
11 x 4.7 carbon fiber props
Ublox gps with built in compass
Turnigy 9x v2 TX and 8 channel Receiver