.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "api/gallery/aerodynamics/airfoils/plot_01_naca_four_digit_sections.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_api_gallery_aerodynamics_airfoils_plot_01_naca_four_digit_sections.py>`
        to download the full example code or to run this example in your browser via JupyterLite.

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_api_gallery_aerodynamics_airfoils_plot_01_naca_four_digit_sections.py:


The NACA four-digit airfoil family
==================================

In NACA Report 460 (1933) Eastman Jacobs and colleagues tested 78 related
sections in the variable-density tunnel. Each is defined by a single
thickness polynomial wrapped around a two-parabola camber line, so four digits
specify the whole shape: ``2412`` has 2% camber at 40% chord and is 12% thick.
:func:`~engineeringkit.aerodynamics.naca4_airfoil` builds the coordinates;
:meth:`~engineeringkit.aerodynamics.Airfoil.summary` recovers the digits from
the geometry.

.. GENERATED FROM PYTHON SOURCE LINES 15-20

.. code-block:: Python

    import matplotlib.pyplot as plt

    from engineeringkit.aerodynamics import naca4_airfoil
    from engineeringkit.aerodynamics.visualizers import plot_airfoil








.. GENERATED FROM PYTHON SOURCE LINES 21-23

Four members of the family
--------------------------

.. GENERATED FROM PYTHON SOURCE LINES 23-39

.. code-block:: Python


    fig, axes = plt.subplots(4, 1, figsize=(7, 7.5), sharex=True)
    for ax, designation in zip(axes, ["0012", "2412", "4412", "6409"], strict=True):
        foil = naca4_airfoil(designation, n=201)
        plot_airfoil(foil, ax=ax)
        s = foil.summary()
        print(
            f"{s['name']}: max thickness {s['max_thickness']:.3f} at x/c = {s['max_thickness_at']:.2f}, "
            f"max camber {s['max_camber']:.3f} at x/c = {s['max_camber_at']:.2f}"
        )
        assert abs(s["max_thickness"] - int(designation[2:]) / 100) < 1e-3
        ax.set_xlabel("")
    axes[-1].set_xlabel("x / c")
    fig.tight_layout()

    plt.show()



.. image-sg:: /api/gallery/aerodynamics/airfoils/images/sphx_glr_plot_01_naca_four_digit_sections_001.png
   :alt: NACA 0012, NACA 2412, NACA 4412, NACA 6409
   :srcset: /api/gallery/aerodynamics/airfoils/images/sphx_glr_plot_01_naca_four_digit_sections_001.png
   :class: sphx-glr-single-img


.. rst-class:: sphx-glr-script-out

 .. code-block:: none

    NACA 0012: max thickness 0.120 at x/c = 0.30, max camber 0.000 at x/c = 0.00
    NACA 2412: max thickness 0.120 at x/c = 0.30, max camber 0.020 at x/c = 0.40
    NACA 4412: max thickness 0.120 at x/c = 0.30, max camber 0.040 at x/c = 0.40
    NACA 6409: max thickness 0.090 at x/c = 0.30, max camber 0.060 at x/c = 0.40





.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 0.303 seconds)


.. _sphx_glr_download_api_gallery_aerodynamics_airfoils_plot_01_naca_four_digit_sections.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: lite-badge

      .. image:: images/jupyterlite_badge_logo.svg
        :target: ../../../../lite/lab/index.html?path=api/gallery/aerodynamics/airfoils/plot_01_naca_four_digit_sections.ipynb
        :alt: Launch JupyterLite
        :width: 150 px

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: plot_01_naca_four_digit_sections.ipynb <plot_01_naca_four_digit_sections.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: plot_01_naca_four_digit_sections.py <plot_01_naca_four_digit_sections.py>`

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: plot_01_naca_four_digit_sections.zip <plot_01_naca_four_digit_sections.zip>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_