Chapter 5, Problem 30P

The shape of a symmetrical four-digit NACA airfoil is described by the equation.

$y=\pm \frac{tc}{0.2}\left[0.2969\sqrt{\frac{x}{c}}-0.1260\frac{x}{c}-0.3516{\left(\frac{x}{c}\right)}^2+0.2843{\left(\frac{x}{c}\right)}^3-0.1015{\left(\frac{x}{c}\right)}^4\right]$

Where c is the cord length and t is the maximum thickness as a fraction of the cord length (tc = maximum thickness). Symmetrical four-digit NACA airfoils are designated NACA 00XX, where XX is 100t(i.e., NACA 0012 has t = 0.12). Plot the shape of a NACA 0020 airfoil with a cord length of 1.5 m.