.. _sphx_glr_api_gallery_aerodynamics_performance:

Performance
-----------

Cruise range from aerodynamic efficiency and engine fuel consumption.


.. raw:: html

  <div id='sg-tag-list' class='sphx-glr-tag-list'></div>


.. raw:: html

    <div class="sphx-glr-thumbnails">

.. thumbnail-parent-div-open

.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Louis Breguet&#x27;s range formula (1923) follows from three facts: thrust equals drag, drag equals weight divided by L/D, and fuel flow is the thrust-specific fuel consumption times thrust. Integrating the weight loss gives R = \frac{V}{g c_T}\frac{L}{D}\ln\frac{W_i}{W_f} (~engineeringkit.aerodynamics.breguet_range): range is the product of engine efficiency, aerodynamic efficiency and a logarithmic fuel fraction. This example checks it against a time-stepped cruise and shows why airliners fly near the best-glide lift coefficient.">

.. only:: html

  .. image:: /api/gallery/aerodynamics/performance/images/thumb/sphx_glr_plot_01_breguet_range_thumb.png
    :alt:

  :doc:`/api/gallery/aerodynamics/performance/plot_01_breguet_range`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">The Breguet range equation</div>
    </div>


.. thumbnail-parent-div-close

.. raw:: html

    </div>


.. toctree::
   :hidden:

   /api/gallery/aerodynamics/performance/plot_01_breguet_range