apm 2.6 v 3.1
Bring quad down from approx 25m in stabalize mode, I began to lose throttle response and quad began to lose altitude faster then desired. Throttled up to 100% and quad still continued to lose altitude leading to a crash.
Read 5 most common problems affecting APM:Copter on wikki and performed following troubleshooting.
Graphed Rollin Vs Roll and Pitchin vs Pitch
Pitchin vs Pitch - begins to diverge right before I lose throttle response
Rollin vs Roll - Roll flat lines briefly before I lose throttle response
Neither of these should affect throttle so not sure if I have found a different problem or if it relates to my throttle issue.
Makes me think there could be a mechanical problem or voltage drop in the Apm leading to brown out. I am using a 3Dr power module.
Check possible brown out I graphed Vcc (first problem, I can’t figure out what the y axis units are for this)
Fluctuates between 5100-5000, assuming y axis is volts *1000, only thing that makes sense in my head.
If my assumption about volts *1000 is correct then the power to the board is ok.
Filtered for error messages but there were none.
Attached the rollin v roll and pitchin vs pitch images. Throttle problem began around 4200 on x-axis.
Dataflash log attached
Run out of ideas, need help!!