"Vernon - Thanks for the very detailed explanation - most of which I have followed and it makes sense. If it were not coupled with ESC calibration problems I'd be happier. But thanks for the trouble you took with the detail.  Paddy"

"Michael  Thanks for your reply.  I've tried the re-calibration and I'm not getting any of the tones or sequences described.  In Auto mode on the second lipo connection it plays all sorts of tunes and just doesn't…"

"I get the same noises. It comes from the way the code works for the ardupilot. While there are claims of a 200hz main loop, common sense says serial write commands are variable as part of that main code loop so it will not be a consistent 200hz. In…"

"when i heard something close to that from mine i ended up replacing the speed control. you might want to redo the calibration. do the cal where the speed control is hooked up to the…"

"Inside the 8000 the power connections  are commoned across all channels including the Bind/Dat so it doesn't matter where you connect.  Getting the telemetry going ... that's a challenge.  All the best."

"MP3 file for earlier post - the original attachment does not appear to have worked."

"The motor can't pull more power than the battery can give.  I have had a flip caught on video and posted here  http://www.availabilitydesign.com/Downloads/UAVCrash.html  - there is more power applied as you can hear but the cause…"