Now let's take a look at how these two theories really work! Here's an experiment to test them. You will need a fan with both a low and a high rate of speed. You will also need two pieces of cardboard. One should be a flat rectangle. The other should be a rectangle formed into the shape of an airfoil. Test what happens to the flat cardboard when you hold it vertically in front of the fan (1). Turn the fan onto the low speed. Now hold the flat cardboard in front of the fan at a horizontal angle (2). .

Presented by Insite Distance Learning and The Academy of Model Aeronautics, with support from The Radio Control Hobby Trade Association and Ball State University.   All contents copyright © 2000 The Indiana Academy / Ball State University phone 800.316.3163  |  fax 765.285.2665  |  e-mail insite@bsu.edu