Hello I recently had some issue on a flight which ended in a 50m ground crash
Here are my settings :
Failsafe : channel 5 -> RTL and Throttle @ 40%
GeoFence: alt 81m, 400m radius, RTL altitude:7m
APM PID settings : i.snag.gy/Y5VVY.jpg
Logfile : drive.google.com/open?id=0B9p2Z … 0c0Nl9UT0U
Issues encountered :
- Quadcopter had a huge destabilisation at “fast” altitude loss, doing some weird stabilization
- Did “loss” the altitude control on this flight, as the quad was acting althold while “stabilized” and throttle values were “modified” by the controller … GeoFence altitude triggered RTL but produced weird results as I could only act upon the Yaw axis … so the quad was stucked at high altitude, setting flight mode to sport caused its “wanted” crash @ 0% throttle
Some data :
Altitude graph : i.snag.gy/VnpMI.jpg
Altitude Graphs : i.snag.gy/8g1tv.jpg ( are these meters or feets ? ) notice the failsafe fence && RTL enabled … which did quite nothing … RTL shall have returned it 7 meters above home position
Channel 5 input : i.snag.gy/JVovx.jpg ( flight mode )
Channel 3 input : throttle : i.snag.gy/pK851.jpg ( throttle )
Throttle input does not match altitude values : i.snag.gy/DZh8f.jpg
Channel 3 input vs output : i.snag.gy/g7Jhg.jpg
( at some time I put throttle off and controller still setting some “hover” throttle ) … only setting the flight mode to sport enabled the quadcopter crash ( as my throttle value was set @ 0 % )
Any clue ? advice ? idea ?
Any enlightment would be greatly appreciated, thanks 