"Dave, I don't know... I'm sure I've never had anything R/C that stopped automatically before going out of range? Why would you expect this one to magically know when to do that? Given that the default out-of-the-box flight ceiling is 3 meters, I…"

"Dave, you couldn't have been more wrong. I realize I'm replying very late, but I wanted to make sure people weren't persuaded by your comments.
1) The sonar is NOT on the top. (Why would they ever do that?) It's on the bottom, as you would expect.…"