Quote:
Originally posted by Mobycat:

If the jet is weightless, all bets are off...then yes, it could take off.
We have weightless aircraft. Blimps and hot-air balloons. But they're not relevant to this discussion.

So the balsa plane takes off because it's light. Get a bigger balsa plane, and try it again. then try it again with a larger, heavier RC plane. Then with an even larger one. If the plane's propulsion system can push enough AIR to move its own weight fast enough to achieve lift, is certainly will not sit still because something's turning its wheels.