I believe 27mhz, pretty safe to say no one at a flying field is generally on that freq, more likely a radio control car though...

anyway, it happens to everything occassionally, either it flys away, or plants itself, things happen.

If you are looking for another plane and want to get into the hobby, might I suggest a sky scooter... (Check out ezonemag.com for good electric forums) It is good electric to start on and does have standard equipment that can be used in other models.