Well, after 230+ hours of flight time and over 10 million feet travelled, I just had a "permanent disconnect event". Flight going fine until a very brief 'high wind' warning (on a rather calm day) then it disconnected, never came home, never reconnected. Found the carcass and it's likely a total write-off. I don't have a lot of time as I'm off to work in a few minutes but I'm hoping someone might be able to give me some insight on the failure. Flight records attached. Here's some gory pictures. Figure it has to be either the propeller snapped in half and caused the crash (three were found still attached, the fourth broken in half and loose) or the battery popped out (I'm always fastidious about ensuring the battery is firmly installed). Leaning towards the latter in this case though, based on the condition of the battery it looks to have fallen without the protection of being inside the bird. See pictures. Let me know what you think, I'll be back soon to answer any questions. Post Script: the crunched battery is currently outside in a salt water bath to discharge it.