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andrewning committed Oct 9, 2024
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<title>FLOW Lab</title>
<link href="http://flow.byu.edu/atom.xml" rel="self"/>
<link href="http://flow.byu.edu/"/>
<updated>2024-10-09T16:00:06-06:00</updated>
<updated>2024-10-09T16:27:59-06:00</updated>
<id>http://flow.byu.edu</id>
<author>
<name>Andrew Ning</name>
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<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" ><generator uri="https://jekyllrb.com/" version="4.3.4">Jekyll</generator><link href="http://flow.byu.edu/feed.xml" rel="self" type="application/atom+xml" /><link href="http://flow.byu.edu/" rel="alternate" type="text/html" /><updated>2024-10-09T16:00:06-06:00</updated><id>http://flow.byu.edu/feed.xml</id><title type="html">FLOW Lab</title><subtitle>Flight, Optimization, and Wind Laboratory</subtitle><author><name>Andrew Ning</name></author><entry><title type="html">Optimization Book Available</title><link href="http://flow.byu.edu/posts/opt-book" rel="alternate" type="text/html" title="Optimization Book Available" /><published>2021-10-15T00:00:00-06:00</published><updated>2021-10-15T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/opt-book</id><content type="html" xml:base="http://flow.byu.edu/posts/opt-book"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:share:6853387400052391936" height="698" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Andrew Ning</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">BEM Paper</title><link href="http://flow.byu.edu/posts/bem-paper" rel="alternate" type="text/html" title="BEM Paper" /><published>2021-07-30T00:00:00-06:00</published><updated>2021-07-30T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/bem-paper</id><content type="html" xml:base="http://flow.byu.edu/posts/bem-paper"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:share:6825450879324434432" height="622" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Andrew Ning</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">Eduardo Research Update</title><link href="http://flow.byu.edu/posts/eduardo-latest" rel="alternate" type="text/html" title="Eduardo Research Update" /><published>2021-03-01T00:00:00-07:00</published><updated>2021-03-01T00:00:00-07:00</updated><id>http://flow.byu.edu/posts/eduardo-latest</id><content type="html" xml:base="http://flow.byu.edu/posts/eduardo-latest"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:6779795433318420480" height="1142" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">Reformulated VPM</title><link href="http://flow.byu.edu/posts/reformulated-vpm" rel="alternate" type="text/html" title="Reformulated VPM" /><published>2021-02-01T00:00:00-07:00</published><updated>2021-02-01T00:00:00-07:00</updated><id>http://flow.byu.edu/posts/reformulated-vpm</id><content type="html" xml:base="http://flow.byu.edu/posts/reformulated-vpm"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:6767685749157588992" height="990" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">Optimization Book Announcement</title><link href="http://flow.byu.edu/posts/optimization-book" rel="alternate" type="text/html" title="Optimization Book Announcement" /><published>2021-01-20T00:00:00-07:00</published><updated>2021-01-20T00:00:00-07:00</updated><id>http://flow.byu.edu/posts/optimization-book</id><content type="html" xml:base="http://flow.byu.edu/posts/optimization-book"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:share:6758135437300154368" height="679" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Andrew Ning</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">PJ Defense</title><link href="http://flow.byu.edu/posts/pj-defense" rel="alternate" type="text/html" title="PJ Defense" /><published>2020-09-30T00:00:00-06:00</published><updated>2020-09-30T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/pj-defense</id><content type="html" xml:base="http://flow.byu.edu/posts/pj-defense"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:share:6714312529692237824" height="641" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Andrew Ning</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">VPM Paper</title><link href="http://flow.byu.edu/posts/vpm-paper" rel="alternate" type="text/html" title="VPM Paper" /><published>2020-08-30T00:00:00-06:00</published><updated>2020-08-30T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/vpm-paper</id><content type="html" xml:base="http://flow.byu.edu/posts/vpm-paper"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:6711406263634419712" height="857" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">Airborne Wind with Vortex Particle Method</title><link href="http://flow.byu.edu/posts/wind-harvesting" rel="alternate" type="text/html" title="Airborne Wind with Vortex Particle Method" /><published>2020-08-16T00:00:00-06:00</published><updated>2020-08-16T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/wind-harvesting</id><content type="html" xml:base="http://flow.byu.edu/posts/wind-harvesting"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:6694076731474739200" height="949" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Judd Mehr and Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">Eduardo’s Past Three Years</title><link href="http://flow.byu.edu/posts/eduardo-three-years" rel="alternate" type="text/html" title="Eduardo’s Past Three Years" /><published>2020-08-10T00:00:00-06:00</published><updated>2020-08-10T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/eduardo-three-years</id><content type="html" xml:base="http://flow.byu.edu/posts/eduardo-three-years"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:6689985497042944000" height="797" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">FLOWUnsteady in Google Drive</title><link href="http://flow.byu.edu/posts/google-drive-vpm" rel="alternate" type="text/html" title="FLOWUnsteady in Google Drive" /><published>2020-08-02T00:00:00-06:00</published><updated>2020-08-02T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/google-drive-vpm</id><content type="html" xml:base="http://flow.byu.edu/posts/google-drive-vpm"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:share:6689003185174118400" height="1094" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry></feed>
<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" ><generator uri="https://jekyllrb.com/" version="4.3.4">Jekyll</generator><link href="http://flow.byu.edu/feed.xml" rel="self" type="application/atom+xml" /><link href="http://flow.byu.edu/" rel="alternate" type="text/html" /><updated>2024-10-09T16:27:59-06:00</updated><id>http://flow.byu.edu/feed.xml</id><title type="html">FLOW Lab</title><subtitle>Flight, Optimization, and Wind Laboratory</subtitle><author><name>Andrew Ning</name></author><entry><title type="html">Optimization Book Available</title><link href="http://flow.byu.edu/posts/opt-book" rel="alternate" type="text/html" title="Optimization Book Available" /><published>2021-10-15T00:00:00-06:00</published><updated>2021-10-15T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/opt-book</id><content type="html" xml:base="http://flow.byu.edu/posts/opt-book"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:share:6853387400052391936" height="698" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Andrew Ning</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">BEM Paper</title><link href="http://flow.byu.edu/posts/bem-paper" rel="alternate" type="text/html" title="BEM Paper" /><published>2021-07-30T00:00:00-06:00</published><updated>2021-07-30T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/bem-paper</id><content type="html" xml:base="http://flow.byu.edu/posts/bem-paper"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:share:6825450879324434432" height="622" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Andrew Ning</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">Eduardo Research Update</title><link href="http://flow.byu.edu/posts/eduardo-latest" rel="alternate" type="text/html" title="Eduardo Research Update" /><published>2021-03-01T00:00:00-07:00</published><updated>2021-03-01T00:00:00-07:00</updated><id>http://flow.byu.edu/posts/eduardo-latest</id><content type="html" xml:base="http://flow.byu.edu/posts/eduardo-latest"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:6779795433318420480" height="1142" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">Reformulated VPM</title><link href="http://flow.byu.edu/posts/reformulated-vpm" rel="alternate" type="text/html" title="Reformulated VPM" /><published>2021-02-01T00:00:00-07:00</published><updated>2021-02-01T00:00:00-07:00</updated><id>http://flow.byu.edu/posts/reformulated-vpm</id><content type="html" xml:base="http://flow.byu.edu/posts/reformulated-vpm"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:6767685749157588992" height="990" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">Optimization Book Announcement</title><link href="http://flow.byu.edu/posts/optimization-book" rel="alternate" type="text/html" title="Optimization Book Announcement" /><published>2021-01-20T00:00:00-07:00</published><updated>2021-01-20T00:00:00-07:00</updated><id>http://flow.byu.edu/posts/optimization-book</id><content type="html" xml:base="http://flow.byu.edu/posts/optimization-book"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:share:6758135437300154368" height="679" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Andrew Ning</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">PJ Defense</title><link href="http://flow.byu.edu/posts/pj-defense" rel="alternate" type="text/html" title="PJ Defense" /><published>2020-09-30T00:00:00-06:00</published><updated>2020-09-30T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/pj-defense</id><content type="html" xml:base="http://flow.byu.edu/posts/pj-defense"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:share:6714312529692237824" height="641" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Andrew Ning</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">VPM Paper</title><link href="http://flow.byu.edu/posts/vpm-paper" rel="alternate" type="text/html" title="VPM Paper" /><published>2020-08-30T00:00:00-06:00</published><updated>2020-08-30T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/vpm-paper</id><content type="html" xml:base="http://flow.byu.edu/posts/vpm-paper"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:6711406263634419712" height="857" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">Airborne Wind with Vortex Particle Method</title><link href="http://flow.byu.edu/posts/wind-harvesting" rel="alternate" type="text/html" title="Airborne Wind with Vortex Particle Method" /><published>2020-08-16T00:00:00-06:00</published><updated>2020-08-16T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/wind-harvesting</id><content type="html" xml:base="http://flow.byu.edu/posts/wind-harvesting"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:6694076731474739200" height="949" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Judd Mehr and Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">Eduardo’s Past Three Years</title><link href="http://flow.byu.edu/posts/eduardo-three-years" rel="alternate" type="text/html" title="Eduardo’s Past Three Years" /><published>2020-08-10T00:00:00-06:00</published><updated>2020-08-10T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/eduardo-three-years</id><content type="html" xml:base="http://flow.byu.edu/posts/eduardo-three-years"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:6689985497042944000" height="797" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">FLOWUnsteady in Google Drive</title><link href="http://flow.byu.edu/posts/google-drive-vpm" rel="alternate" type="text/html" title="FLOWUnsteady in Google Drive" /><published>2020-08-02T00:00:00-06:00</published><updated>2020-08-02T00:00:00-06:00</updated><id>http://flow.byu.edu/posts/google-drive-vpm</id><content type="html" xml:base="http://flow.byu.edu/posts/google-drive-vpm"><![CDATA[<iframe src="https://www.linkedin.com/embed/feed/update/urn:li:share:6689003185174118400" height="1094" width="504" frameborder="0" allowfullscreen="" title="Embedded post"></iframe>]]></content><author><name>Eduardo Alvarez</name></author><summary type="html"><![CDATA[]]></summary></entry></feed>
2 changes: 1 addition & 1 deletion me415/schedule/hw5/index.html
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Expand Up @@ -95,7 +95,7 @@ <h1 id="hw-5-dynamic-stability-and-battery">HW 5: Dynamic Stability and Battery<

<ol>
<li>
<p>Model the following simple airplane in XFLR5. Use a NACA 0012 for every airfoil. Chord and twist is constant along each lifting surface (wing and tails). Report the eigenvalues and identify the corresponding mode (e.g., dutch roll, spiral). Report the key stability derivatives for static stability: \({C_m}_{,\alpha}, {C_n}_{,\beta}, {C_{roll}}_{, \beta}\). Just use sea-level properties (though it won’t matter for stability derivatives since they are normalized). Note that for stability a viscous analysis is optional. While the drag has a major role in performance, it typically has very little impact on dynamics.</p>
<p>Model the following simple airplane in XFLR5. Use a NACA 0012 for every airfoil. Chord and twist is constant along each lifting surface (wing and tails). Report the eigenvalues and identify the corresponding mode (e.g., dutch roll, spiral). Report the key stability derivatives for static stability: \({C_m}_{,\alpha}, {C_n}_{,\beta}, {C_{roll}}_{, \beta}\). Just use sea-level properties (though it won’t matter for stability derivatives since they are normalized). Note that for stability a viscous analysis is optional. While the drag has a major role in performance, it typically has very little impact on dynamics. The most helpful <a href="https://www.youtube.com/playlist?list=PLtl5ylS6jdP6uOxzSJKPnUsvMbkmalfKg">videos</a> for this problem are the first few minutes of 12, the first half of 13, and 14.</p>

<p><img src="../dynamic.png" width="800px" class="img-center" /></p>
</li>
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