Recent content by retang

The problem is, is that the buoyant force is not known. Only the speed of the balloon is known, and the weight of the parts is known.

Hi, I am trying to caculate the aerodynamic drag on a weather balloon that's climbing through the atmosphere. Of course, the velocity is very low here, about 4m/s. Such a balloon is an almost perfect sphere. So I am trying to fill in the drag equation, but I still have two unknown...