Greetings, this has happened twice: perfect flight, 6 or 7 minutes in, climb to about 60 feet, suddenly motors dead stop, power gone, drop from the sky with no response from the TX. Hit the ground with heavy damage. In both cases, a couple of strange beeps from my TX preceeded the loss of power. Checked all power connections, seemed fine... all engines failed. Attached is the log for the last flight. (no wireless telem, I am aware there was no gps lock on this flight, copter was 150 ft away from me).
Thanks for any thoughts...