A friend of mine and I have identical airplanes. I came up with the idea of attaching a string to the left wingtip of both planes so it might be possible to take-off and land in a very small area. Both planes are small electrics with pusher props, and we did this with no one else around, so there wasn't much of a safety issue. Well, the experiment worked - kinda. The planes took off and stayed in a nice circular formation. The problem was that they then just drifted with the wind. Rudder inputs did nothing but slow down the plane (due to drag, I guess) and caused the other to fly around it.
My question is, is there any way to control the planes once they are in the air? Altitude is completely controllable, but it seems that wind will decide where they will go.