"After testing and re-examining the 3DR PDB wiring...
In hindsight it's obvious... at least one of the red (middle, power) wires from the BEC needs to remain connected to power the ArduPilot. This is how the 3DR PDB are designed,…"
"I am also suspecting the BECs are the problem. Here's my reasoning:
RedPalm's log does seem to show the ArduPilot was giving the right signals. Unless the motor failed, the BEC cutting the power to the motor is the most likely…"
"I should add that I've been flying ArduPilot aircraft (multi-rotors and planes) for about three years now and this is the first time I've encountered this problem. Because of this, I'm more than a little inclined to think…"
I'm having a similar problem and am trying to get to the bottom of it by comparing your configuration with mine.
BTW, I admire the foam cushion design.
Can you share a little more of your thinking on why you reduced the RATE_PIT_P…"
"I believe I have read the Manual thoroughly and have not found a complete key to the parameters. So, I have experimented and parsed the code to learn their effects. I also have not found a detailed key to the log files. I figured…"
"I bought a Castle BEC a few months ago and I've been staring at it :) wondering: Is the BEC necessary because the ESC is designed poorly? Why doesn't someone make an ESC that isolates the motor pulse circuit from the BEC?"
"I really am of a mixed on this. On the one hand, the amount of current that the ESC must supply to run the servos, APM, Rx, and Xbee is trivial compared to the motor's draw. (This points to quality, not quantity.) But the fact…"
"Warren, I agree with you on the quality of the current being the big factor. However, capacity comes to mind... when I removed the aileron servos (which together have leads about a meter long) and attached a single…"
"I realized something that I should have picked up sooner: When you install an APM in a model plane that calls for, say, a 30 amp ESC, you may need to increase the size of the ESC. I was recently getting some strange bugs (servos moving…"
Been flying model planes for 40 years. Started with line control, moved onto R/C, and started experimenting with telemetry about 5 years ago. My sons and I have flown competitively and won a purse or two. UAV could make us even faster.