I would agree with the above. At 400 # it should act much like a full scale. In fact a 1/4 scale piper cub at 15 or 20# or so will handle quite scalelike I am told. I do not quite understand the reason there is a difference in size,but I know that is the case. Take for example the way a real small model [1# or so] and compare with a 1/4 scale bird and you would see a lot of difference in the way it responds to commands.