Here's a better example of lower speed aerobatics, right on the deck. The engine is a dieselized Norvel .074 and the plane weighs just 20 ounces.

http://video.google.com/videoplay?do...nter+minisport

And this is the engine pulling it.

http://www.youtube.com/watch?v=af4dQNa60_w

At 11K with an 8 x 4, static is just a shade over 21 ounces.