What did we do?

Our first attempt at making a tornado machine used an updraft fan only with a pan of steaming water to make the tornado visible. We weren't able to make a vortex this way so we revised our model to use two fans, one on the side and one for an updraft. We also added a cool mist humidifier make the tornado visible. We then set up a balsa wood model town so we could see how destructive the tornado was with each fan setting. The side fan had two settings, and the top fan had three. more...