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<html>
<head>
<title>
NACA - NACA Airfoils
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
NACA <br> NACA Airfoils
</h1>
<hr>
<p>
<b>NACA</b>
is a C++ library which
can take the parameters of certain NACA airfoils and return the
coordinates of a sequence of points that outline the wing shape.
The data can be displayed with gnuplot.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this
web page are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>NACA</b> is available in
<a href = "../../c_src/naca/naca.html">a C version</a> and
<a href = "../../cpp_src/naca/naca.html">a C++ version</a> and
<a href = "../../f77_src/naca/naca.html">a FORTRAN77 version</a> and
<a href = "../../f_src/naca/naca.html">a FORTRAN90 version</a> and
<a href = "../../m_src/naca/naca.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../cpp_src/gnuplot/gnuplot.html">
GNUPLOT</a>,
C++ programs which
illustrate how a program can write data and command files
so that gnuplot can create plots of the program results.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
Eastman Jacobs, Kenneth Ward, Robert Pinkerton,<br>
"The characteristics of 78 related airfoil sections from tests in
the variable-density wind tunnel",<br>
NACA Report 460, 1933.
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "naca.cpp">naca.cpp</a>, the source code.
</li>
<li>
<a href = "naca.hpp">naca.hpp</a>, the include file.
</li>
<li>
<a href = "naca.sh">naca.sh</a>,
BASH commands to compile the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "naca_prb.cpp">naca_prb.cpp</a>,
a sample calling program.
</li>
<li>
<a href = "naca_prb.sh">naca_prb.sh</a>,
commands to compile and run the program.
</li>
<li>
<a href = "naca_prb_output.txt">naca_prb_output.txt</a>,
the output file.
</li>
<li>
<a href = "symmetric_data.txt">symmetric_data.txt</a>,
the data outlining the NACA symmetric 4-digit airfoil.
</li>
<li>
<a href = "symmetric_commands.txt">symmetric_commands.txt</a>,
gnuplot commands to plot the data.
</li>
<li>
<a href = "symmetric.png">symmetric.png</a>,
a PNG image of the data.
</li>
<li>
<a href = "cambered_data.txt">cambered_data.txt</a>,
the data outlining the NACA cambered 4-digit airfoil.
</li>
<li>
<a href = "cambered_commands.txt">cambered_commands.txt</a>,
gnuplot commands to plot the data.
</li>
<li>
<a href = "cambered.png">cambered.png</a>,
a PNG image of the data.
</li>
</ul>
</p>
<h3 align = "center">
List of Routines:
</h3>
<p>
<ul>
<li>
<b>NACA4_CAMBERED:</b> (xu,yu), (xl,yl) for a NACA cambered 4-digit airfoil.
</li>
<li>
<b>NACA4_SYMMETRIC</b> evaluates y(x) for a NACA symmetric 4-digit airfoil.
</li>
<li>
<b>R8MAT_WRITE</b> writes an R8MAT file.
</li>
<li>
<b>R8VEC_LINSPACE</b> creates a vector of linearly spaced values.
</li>
<li>
<b>R8VEC_MAX</b> returns the maximum value in an R8VEC.
</li>
<li>
<b>R8VEC_MIN</b> returns the minimum value of an R8VEC.
</li>
<li>
<b>TIMESTAMP</b> prints the current YMDHMS date as a time stamp.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../cpp_src.html">
the C++ source codes</a>.
</p>
<hr>
<i>
Last revised on 22 May 2014.
</i>
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