<HTML><BODY>
<div>Nat, Dean,</div>
<div> </div>
<div>It seems to me that for the kind of thing we are involved in, the boost in control performance is desired. Drag is not necessarily our enemy...in fact quite the contrary. We've been building fattened TEs on our models' control surfaces and have been deriving the benefits, perhaps unwittingly. It has been useful information and the benefits would appear to outweigh the penalty.</div>
<div> </div>
<div>However, this may not hold true for other flight regimes. If one were to look at the wing TE of a 777 for example.....quite sharp. Ditto for fighters and racers. These are distinct and different regimes than our interest, with a totally different goal in mind....n'est-ce pas? </div>
<div> </div>
<div>On the other hand, sailplanes would probably also benefit and here there appears to be a mixed bag of thicknesses.</div>
<div> </div>
<div>I guess the point is "it depends"</div>
<div> </div>
<div>Matt</div>
<div> </div>
<br>
-----Original Message-----<br>
From: d.pappas@kodeos.com<br>
To: nsrca-discussion@lists.nsrca.org<br>
Sent: Tue, 13 Feb 2007 1:25 PM<br>
Subject: Re: [NSRCA-discussion] Trailing Edge<br>
<br>
<STYLE>
.AOLPlainTextBody {
margin: 0px;
font-family: Tahoma, Verdana, Arial, Sans-Serif;
font-size: 12px;
color: #000;
background-color: #fff;
}
.AOLPlainTextBody pre {
font-size: 9pt;
}
.AOLInlineAttachment {
margin: 10px;
}
.AOLAttachmentHeader {
font: 11px arial;
border: 1px solid #7DA8D4;
background: #F9F9F9;
}
.AOLAttachmentHeader .Title {
font: 11px arial;
background: #B5DDFA;
padding: 3px 3px 3px 3px;
}
.AOLAttachmentHeader .FieldLabel {
font: 11px arial;
color: #000000;
padding: 1px 10px 1px 9px;
background: #F9F9F9;
}
.AOLAttachmentHeader .FieldValue {
font: 11px arial;
color: #000000;
background: #F9F9F9;
}
.AOLAttachmentHeader a, .AOLImage a {
color: #2864B4;
text-decoration: none;
}
.AOLAttachmentHeader a:hover, .AOLImage a:hover {
color: #2864B4;
text-decoration: underline;
}
.AOLWebSuiteCompose .AOLPicturesFullSizeLink,
.AOLWebSuite .AOLPicturesFullSizeLink {
height: 1px;
width: 1px;
overflow: hidden;
}
body {
background-color: white;
font-family: "Verdana";
font-size: 10pt;
border: 0px;
}
.AOLWebSuiteCompose p {
margin: 0px;
padding: 0px;
}
img.managedImg {
width: 0px;
height: 0px;
}
img.placeholder {
width: 275px;
height: 206px;
background: #F4F4F4 center center no-repeat;
border: 1px solid #DADAD6 !important;
}
</STYLE>
<div id=AOLMsgPart_3_2e2e4041-dbdf-4c18-b9b4-b42b9ef812a8>
<STYLE></STYLE>
<div><SPAN class=418021118-13022007><FONT face=Arial color=#0000ff size=2>Hi Nat,</FONT></SPAN></div>
<div><SPAN class=418021118-13022007><FONT face=Arial color=#0000ff size=2>So the Princeton Aero department had many of its facilities just a couple of miles up US Route 1 from the College, at Princeton-Forrestal airport.</FONT></SPAN></div>
<div><SPAN class=418021118-13022007><FONT face=Arial color=#0000ff size=2>It is owned by the University. The land is gradually being gobbled up by industrial developments and the runway is gone now. Bummer 'cause we used to hold a Pattern contest there years ago. </FONT></SPAN></div>
<div><SPAN class=418021118-13022007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </div>
<div><SPAN class=418021118-13022007><FONT face=Arial color=#0000ff size=2>The SAE weight lifting contest is still a going concern. It sure is neat ... why wasn't this sort of thing around when I was in Engineering School?</FONT></SPAN></div>
<div> </div>
<div><FONT face="Times New Roman">Dean Pappas</FONT> <br>
<FONT face="Times New Roman">Sr. Design Engineer</FONT> <br>
<FONT face="Times New Roman">Kodeos Communications</FONT> <br>
<FONT face="Times New Roman">111 Corporate Blvd.</FONT> <br>
<FONT face="Times New Roman">South Plainfield, N.J. 07080</FONT> <br>
<FONT face="Times New Roman">(908) 222-7817 phone</FONT> <br>
<FONT face="Times New Roman">(908) 222-2392 fax</FONT> <br>
<FONT face="Times New Roman"><A href='javascript:parent.ComposeTo("d.pappas%40kodeos.com", "");'>d.pappas@kodeos.com</A></FONT> </div>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<div class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma size=2>-----Original Message-----<br>
<B>From:</B> <A href='javascript:parent.ComposeTo("nsrca-discussion-bounces%40lists.nsrca.org", "");'>nsrca-discussion-bounces@lists.nsrca.org</A> [<A href='javascript:parent.ComposeTo("nsrca-discussion-bounces%40lists.nsrca.org", "");'>mailto:nsrca-discussion-bounces@lists.nsrca.org</A>]<B>On Behalf Of </B>Nat Penton<br>
<B>Sent:</B> Tuesday, February 13, 2007 11:29 AM<br>
<B>To:</B> NSRCA Mailing List<br>
<B>Subject:</B> Re: [NSRCA-discussion] Trailing Edge<br>
<br>
</FONT></div>
<div><FONT face=Arial size=2>Dean</FONT></div>
<div><FONT face=Arial size=2>The old NACA must have done this research in the distant past. I recall, in the 80s, Jim Bede extolling on the virtues. </FONT></div>
<div><FONT face=Arial size=2></FONT> </div>
<div><FONT face=Arial size=2> The Princeton project, that would be fun, especially as a student. Would have kept my attention <G>. Nat</FONT></div>
<BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<div style="FONT: 10pt arial">----- Original Message ----- </div>
<div style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=d.pappas@kodeos.com href="mailto:d.pappas@kodeos.com">Dean Pappas</A> </div>
<div style="FONT: 10pt arial"><B>To:</B> <A title=nsrca-discussion@lists.nsrca.org href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </div>
<div style="FONT: 10pt arial"><B>Sent:</B> Tuesday, February 13, 2007 10:03 AM</div>
<div style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Trailing Edge</div>
<div><br>
</div>
<div><SPAN class=725475815-13022007><FONT face=Arial color=#0000ff size=2>Thanks Nat,</FONT></SPAN></div>
<div><SPAN class=725475815-13022007><FONT face=Arial color=#0000ff size=2>I have a guy in the local club who corroborates Barnaby's statement. Locally to NSRCA D1, back in the 80's he was known as "forever in Sportsman George".</FONT></SPAN></div>
<div><SPAN class=725475815-13022007><FONT face=Arial color=#0000ff size=2>He is recently retired from teaching at the Aero group at Princeton U. and he still coaches the students involved in the weight lifting contest.</FONT></SPAN></div>
<div><SPAN class=725475815-13022007><FONT face=Arial color=#0000ff size=2>It was nice to have an excuse to go hunt him down!</FONT></SPAN></div>
<div><SPAN class=725475815-13022007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </div>
<div><SPAN class=725475815-13022007><FONT face=Arial color=#0000ff size=2>later,</FONT></SPAN></div>
<div><SPAN class=725475815-13022007><FONT face=Arial color=#0000ff size=2>Dean</FONT></SPAN></div>
<div> </div>
<div><FONT face="Times New Roman">Dean Pappas</FONT> <br>
<FONT face="Times New Roman">Sr. Design Engineer</FONT> <br>
<FONT face="Times New Roman">Kodeos Communications</FONT> <br>
<FONT face="Times New Roman">111 Corporate Blvd.</FONT> <br>
<FONT face="Times New Roman">South Plainfield, N.J. 07080</FONT> <br>
<FONT face="Times New Roman">(908) 222-7817 phone</FONT> <br>
<FONT face="Times New Roman">(908) 222-2392 fax</FONT> <br>
<FONT face="Times New Roman"><A href='javascript:parent.ComposeTo("d.pappas%40kodeos.com", "");'>d.pappas@kodeos.com</A></FONT> </div>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<div class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma size=2>-----Original Message-----<br>
<B>From:</B> <A href='javascript:parent.ComposeTo("nsrca-discussion-bounces%40lists.nsrca.org", "");'>nsrca-discussion-bounces@lists.nsrca.org</A> [<A href='javascript:parent.ComposeTo("nsrca-discussion-bounces%40lists.nsrca.org", "");'>mailto:nsrca-discussion-bounces@lists.nsrca.org</A>]<B>On Behalf Of </B>Nat Penton<br>
<B>Sent:</B> Tuesday, February 13, 2007 1:05 AM<br>
<B>To:</B> NSRCA Mailing List<br>
<B>Subject:</B> [NSRCA-discussion] Trailing Edge<br>
<br>
</FONT></div>
<div><FONT face=Arial size=2>Kitplanes, Dec 06 Wind Tunnel by Barnaby Wainfan</FONT></div>
<div><FONT face=Arial size=2></FONT> </div>
<div><FONT face=Arial size=2>" The airfoil with the chopped trailing edge will produce slightly more lift at the same angle of attack than a sharp trailing-edged airfoil. Because the wake is filled in the controll is crisper and more effective and does not have to move as far to cause a change in lift"</FONT></div>
</BLOCKQUOTE>
<div>
<HR>
<div></div>
_______________________________________________<br>
NSRCA-discussion mailing list<br>
<A href='javascript:parent.ComposeTo("NSRCA-discussion%40lists.nsrca.org", "");'>NSRCA-discussion@lists.nsrca.org</A><br>
<A href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target=_blank>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</A></BLOCKQUOTE></BLOCKQUOTE></div>
<!-- end of AOLMsgPart_3_2e2e4041-dbdf-4c18-b9b4-b42b9ef812a8 -->
<div class=AOLPlainTextBody id=AOLMsgPart_4_2e2e4041-dbdf-4c18-b9b4-b42b9ef812a8><PRE><TT>_______________________________________________
NSRCA-discussion mailing list
<A href='javascript:parent.ComposeTo("NSRCA-discussion%40lists.nsrca.org", "");'>NSRCA-discussion@lists.nsrca.org</A>
<A href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target=_blank>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</A>
</TT></PRE></div>
<!-- end of AOLMsgPart_4_2e2e4041-dbdf-4c18-b9b4-b42b9ef812a8 -->
<div class="AOLPromoFooter">
<hr style="margin-top:10px;" />
<a href="http://pr.atwola.com/promoclk/1615326657x4311227241x4298082137/aol?redir=http%3A%2F%2Fwww%2Eaol%2Ecom%2Fnewaol" target="_blank"><b>Check out the new AOL</b></a>. Most comprehensive set of free safety and security tools, free access to millions of high-quality videos from across the web, free AOL Mail and more.<br />
</div>
</BODY></HTML>