Hi.
I just finished a quad copter build using a Pixhawk, F450 frame, E300 motors/ESCs, 3s battery, Taranis X8R receiver.
Today I went out to fly 2 batteries. Later on the 2nd battery’s flight, the copter starts descending (given my initial throttle down input), and no matter what I did on throttle channel, it just descended, quite abruptly. Looking at the flight log (download here: http://emcheio.com/rI) gives me no clue of what happened, it only confirms what I just described. It felt like the motors couldn’t handle the copter weight somehow.
I’ve been flying a hexacopter based on Pixhawk and E300 motors/ESCs and this never happened.
I can’t confirm exact weight but it should be around 2kg with all gear plus battery installed.
Can somebody help me understand what happened?
Log file:
http://emcheio.com/rI
Log screenshot:
http://i.imgur.com/k2Wdybr.jpg
P.S. Another thing that happened before first flight was that after powering on the pixhawk, the status led blinked red and blue (police pattern) , I went to mission planner and noticed that I had no RC input readings. It got fixed after 2 power cycles.
Thanks!