<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle C_{N}}"><semantics><mrow class="MJX-TeXAtom-ORD"><mstyle displaystyle="true" scriptlevel="0"><msub><mi>C</mi><mrow class="MJX-TeXAtom-ORD"><mi>N</mi></mrow></msub></mstyle></mrow><annotation encoding="application/x-tex">{\displaystyle C_{N}}</annotation></semantics></math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/977915dd0fc4be599697ee95efb498350bad48f8" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.671ex; width:3.353ex; height:2.509ex;" alt="{\displaystyle C_{N}}"></span> for lattice fins of Brooks and Burkhalter lattice fins, the reference area is the frame section. According to Experimental and Analytical Analysis of Grid Fin Configurations, AIAA-88-0280, R. A. Brooks and J. E. Burkhalter <a rel="nofollow" class="external autonumber" href="https://vdocuments.net/american-institute-of-aeronautics-and-astronautics-26th-aerospace-sciences-58532ac7503d5.html">[2]</a>.
<a href="//commons.wikimedia.org/wiki/User:Bernard_de_Go_Mars" title="User:Bernard de Go Mars">Bernard de Go Mars</a>
<span class="int-own-work" lang="en">Own work</span>