
At Mission Peak today... this guy was flying his radio-controlled flying wing. It's really more like a hang-glider than an airplane, since he only uses the propeller when there isn't sufficient updraft. It's almost always windy at the Peak, where real hang-gliders and para-sailors regularly soar.
This wing was way cool. Aside from flying sideways, he could do rolls... didn't see him do a loop-de-loop, though. Amazingly stable.