Consider a model airplane that has a rectangular wing with a span of 3.0 m, a chord length of 0.5m, (and
therefore a total area of 1.5m2). Suppose it is to have a maximum mass of 10.0 kg. Assume standard sea
level conditions in all of the following.
a) What is the Reynolds number for this wing assuming flight speeds of 10m/s and 20 m/s?
b) Special airfoils are needed to operate effectively at low Reynold’s numbers. Using
http://airfoiltools.com, find two airfoils in the “Selig” family, that might be suitable for use in low
Reynold’s number applications, one with low camber and one with high camber.
• Download the coordinates of each of these airfoils, and then import these coordinates into
Matlab. Use Matlab to plot each of the airfoil shapes on a single set of axes (i.e. both shapes
should be superimposed atop each other). Use a legend to identify the designations of each
airfoil on the plot. Be sure to use the “axis equal” command in Matlab so that the plot is a
scale drawing of the airfoils, scaled equally in the horizontal and vertical directions.
In your write-up, include information on the maximum thickness, maximum camber, and location of
maximum camber for each airfoil.