Thanks for the note.

I don't think there is much to worry about with a rubber-power airplane. It's much lighter than a frisbee and moves much slower.

I suppose the municipal police could come and ask me to stop but I'll worry about that only if it happens.

Who'd live in a city that would ban frisbees, baseballs and such.

Here's a video of me in the park when there are lots of kids playing soccer.

http://www.rubber-power.com/Gallery12.htm

I think a soccer ball is much more dangerous.