ORIGINAL: RCShadow
How are you applying power to take-off? The way I would take-off with my Cubs (full-size as well

):
o Full up elevator
o Right rudder
o Apply power slowly until some speed is built
o Slowly let off the up elevator as speed builds
o Keep right rudder as needed for wind and tork (P-Factor)
o Lift her off the ground when the tail is flying and rotation speed is acheived
Hope this helps.
This is the way I do it with my 80" Cub. Its challenging to learn but once you get it, its fun and looks great. I have quite a few planes that I fly but none that I enjoy more than my Cub. Performing touch and goes with a Cub, run it down the runway on its mains, it don't get any better than that!