I *know* I saw a RC plane pass right off of our starboard wing once as we were about 4 miles from the end of the runway at Moffett Field going in to land. Just a quick flash out of the corner of my eye. The pilots were busy with the approach and I was sitting in the center seat doing my usual scanning of the airspace, between power changes and checklists, looking for bug smashers (little airplanes) and balloons when it zipped by. To say the least, it would have sucked to have it hit us, especially if we took it in a prop or down an intake.
bob