Let me guess how this works: from the nose view, the paper strips being at one side cause the stick to angle toward it, since the center of mass is close to the

Let me guess how this works: from the nose view, the paper strips being at one side cause the stick to angle toward it, since the center of mass is close to the stick than the center of the drag force due to the stick's relatively small cross section for its mass. This causes the craft to keep pitching up. In addition, the same difference in cross sections between the hoops and the the stick from the plan view give it roll stability. Meanwhile, the larger hoop being at the back causes more drag, giving it yaw stability.