Center of mass

Hi Guys!
I found an article which describes how to use the center of mass
Yes, it really works, but only if the item is on the ground. In flight, it also flies directly.
My mission: to make sure that the object was flying until begins to turn, by the center of mass.
Can anyone knows how to help me?

P.S. sorry fo english, i use translator.

No I did not properly set the task.
I need the item to the right place is always falling down, like a cat on his paws.

I have no idea what you are asking. I guess you’ll have to find a better translator…