REFLECTOR:TUNE, STRAIGHT EXHAUST PIPES

Tom Martino reflector@tvbf.org
Thu, 5 Feb 2004 21:46:08 -0700


This is a multi-part message in MIME format.

------_=_NextPart_001_01C3EC6C.22BF7DEF
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

I have six individual pipes.  Each one is connected (the usual way with
a flange) to the cylinder, then each one extends straight down,
12-inches.  They are rock solid, thick stainless.  They are all
independent.
=20
 =20
=20
=20
-----Original Message-----
From: Jim Sower [mailto:canarder@frontiernet.net]=20
Sent: Thursday, February 05, 2004 9:24 PM
To: reflector@tvbf.org
Subject: Re: REFLECTOR:TUNE, STRAIGHT EXHAUST PIPES
=20
Tom,=20
By straight "tuned" exhaust pipes do you mean sticking straight out the
cowl?  I saw pictures of a Velocity with what appeared to be a pipe from
a 3-into-1 header sticking straight out of the cowl.  I would NEVER do
that.  Exhaust exiting the airplane that way creates "rooster tail" drag
that is the rough equivalent of having the pipe sticking out a foot or
two from the airplane.  That's a LOT of drag.  I would be inclined to
find out if the guy who made the 3-into-1 pipes that went out the back
still had his jigs and get some of those.  Shirl Dickey went NUTS for
over a year trying to track down some hideous vibration in his E-Racer
and found out it was exhaust pulses from the stub pipes from his V-8
routed straight through the cowl going through the prop.=20
Tom Martino wrote:=20
	I ordered and received six straight, 12-inch, tuned exhaust
pipes - stainless, with a generous flange and a reinforced collar. I
have talked to a few structural welders for ideas of brackets to tie
them to the engine. Each one of them examined the installation and told
me they wouldn't do anything. They said I should just let them hang
(with the exception of a safety cable on each, in case they broke away.
	Their reasoning is this:The exhaust tubes become part of the
engine.They will move and vibrate with the engine and a 12" extension
does not hang down far enough to create a mechanical "disadvantage".They
say if I tie them to the engine, I could actually create a weak spot,
causing it to stress at that point.=20
	I am not a welder, nor have I had personal experience with
straight pipes hanging 12 inches off of an engine.Can I get some
feedback? =20
	I plan on using a safety cable but should I go further?
--=20
Jim Sower ... Destiny's Plaything=20
Crossville, TN; Chapter 5=20
Long-EZ N83RT, Velocity N4095T=20
 =20

------_=_NextPart_001_01C3EC6C.22BF7DEF
Content-Type: text/html;
	charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html xmlns:o=3D"urn:schemas-microsoft-com:office:office" =
xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
xmlns=3D"http://www.w3.org/TR/REC-html40">

<head>
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Dus-ascii">


<meta name=3DProgId content=3DWord.Document>
<meta name=3DGenerator content=3D"Microsoft Word 10">
<meta name=3DOriginator content=3D"Microsoft Word 10">
<link rel=3DFile-List href=3D"cid:filelist.xml@01C3EC32.9CE96FD0">
<!--[if gte mso 9]><xml>
 <o:OfficeDocumentSettings>
  <o:DoNotRelyOnCSS/>
 </o:OfficeDocumentSettings>
</xml><![endif]--><!--[if gte mso 9]><xml>
 <w:WordDocument>
  <w:SpellingState>Clean</w:SpellingState>
  <w:GrammarState>Clean</w:GrammarState>
  <w:DocumentKind>DocumentEmail</w:DocumentKind>
  <w:EnvelopeVis/>
 </w:WordDocument>
</xml><![endif]-->
<style>
<!--
 /* Font Definitions */
 @font-face
	{font-family:Tahoma;
	panose-1:2 11 6 4 3 5 4 4 2 4;
	mso-font-charset:0;
	mso-generic-font-family:swiss;
	mso-font-pitch:variable;
	mso-font-signature:1627421319 -2147483648 8 0 66047 0;}
 /* Style Definitions */
 p.MsoNormal, li.MsoNormal, div.MsoNormal
	{mso-style-parent:"";
	margin:0in;
	margin-bottom:.0001pt;
	mso-pagination:widow-orphan;
	font-size:12.0pt;
	font-family:"Times New Roman";
	mso-fareast-font-family:"Times New Roman";}
a:link, span.MsoHyperlink
	{color:blue;
	text-decoration:underline;
	text-underline:single;}
a:visited, span.MsoHyperlinkFollowed
	{color:purple;
	text-decoration:underline;
	text-underline:single;}
p
	{mso-margin-top-alt:auto;
	margin-right:0in;
	mso-margin-bottom-alt:auto;
	margin-left:0in;
	mso-pagination:widow-orphan;
	font-size:12.0pt;
	font-family:"Times New Roman";
	mso-fareast-font-family:"Times New Roman";}
span.EmailStyle18
	{mso-style-type:personal;
	mso-style-noshow:yes;
	mso-ansi-font-size:10.0pt;
	mso-bidi-font-size:10.0pt;
	font-family:Arial;
	mso-ascii-font-family:Arial;
	mso-hansi-font-family:Arial;
	mso-bidi-font-family:Arial;
	color:windowtext;}
span.EmailStyle19
	{mso-style-type:personal-reply;
	mso-style-noshow:yes;
	mso-ansi-font-size:10.0pt;
	mso-bidi-font-size:10.0pt;
	font-family:Arial;
	mso-ascii-font-family:Arial;
	mso-hansi-font-family:Arial;
	mso-bidi-font-family:Arial;
	color:navy;}
span.GramE
	{mso-style-name:"";
	mso-gram-e:yes;}
@page Section1
	{size:8.5in 11.0in;
	margin:1.0in 1.25in 1.0in 1.25in;
	mso-header-margin:.5in;
	mso-footer-margin:.5in;
	mso-paper-source:0;}
div.Section1
	{page:Section1;}
-->
</style>
<!--[if gte mso 10]>
<style>
 /* Style Definitions */=20
 table.MsoNormalTable
	{mso-style-name:"Table Normal";
	mso-tstyle-rowband-size:0;
	mso-tstyle-colband-size:0;
	mso-style-noshow:yes;
	mso-style-parent:"";
	mso-padding-alt:0in 5.4pt 0in 5.4pt;
	mso-para-margin:0in;
	mso-para-margin-bottom:.0001pt;
	mso-pagination:widow-orphan;
	font-size:10.0pt;
	font-family:"Times New Roman";}
</style>
<![endif]-->
</head>

<body lang=3DEN-US link=3Dblue vlink=3Dpurple =
style=3D'tab-interval:.5in'>

<div class=3DSection1>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I have six individual pipes.<span
style=3D'mso-spacerun:yes'>&nbsp; </span>Each one is connected (the =
usual way with a
flange) to the cylinder, <span class=3DGramE>then</span> each one =
extends straight
down, 12-inches.<span style=3D'mso-spacerun:yes'>&nbsp; </span>They are =
rock solid,
thick stainless.<span style=3D'mso-spacerun:yes'>&nbsp; </span>They are =
all
independent.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><span =
style=3D'mso-spacerun:yes'>&nbsp; </span><o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<div>

<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy;mso-no-proof:yes'>&nbsp;</span></fon=
t><o:p></o:p></p>

</div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DTahoma><span
style=3D'font-size:10.0pt;font-family:Tahoma'>-----Original =
Message-----<br>
<b><span style=3D'font-weight:bold'>From:</span></b> Jim Sower
[mailto:canarder@frontiernet.net<span class=3DGramE>] <br>
<b><span style=3D'font-weight:bold'>Sent</span></b></span><b><span
style=3D'font-weight:bold'>:</span></b> Thursday, February 05, 2004 9:24 =
PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> =
reflector@tvbf.org<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Re: =
REFLECTOR<span
class=3DGramE>:TUNE</span>, STRAIGHT EXHAUST PIPES</span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>Tom, <br>
By straight &quot;tuned&quot; exhaust pipes do you mean sticking =
straight out
the cowl?&nbsp; I saw pictures of a Velocity with what appeared to be a =
pipe
from a 3-into-1 header sticking straight out of the cowl.&nbsp; I would =
NEVER
do that.&nbsp; Exhaust exiting the airplane that way creates =
&quot;rooster
tail&quot; drag that is the rough equivalent of having the pipe sticking =
out a
foot or two from the airplane.&nbsp; That's a LOT of drag.&nbsp; I would =
be
inclined to find out if the guy who made the 3-into-1 pipes that went =
out the
back still had his jigs and get some of those.&nbsp; Shirl Dickey went =
NUTS for
over a year trying to track down some hideous vibration in his E-Racer =
and
found out it was exhaust pulses from the stub pipes from his V-8 routed
straight through the cowl going through the prop. =
<o:p></o:p></span></font></p>

<p style=3D'margin-left:.5in'><font size=3D3 face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'>Tom Martino wrote: =
<o:p></o:p></span></font></p>

<blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt' =
TYPE=3DCITE><!--[if gte mso 9]><xml>
 <u1:OfficeDocumentSettings>
  <u1:DoNotRelyOnCSS/>
 </u1:OfficeDocumentSettings>
</xml><![endif]--><!--[if gte mso 9]><xml>
 <u2:WordDocument>
  <u2:SpellingState>Clean</u2:SpellingState>
  <u2:GrammarState>Clean</u2:GrammarState>
  <u2:DocumentKind>DocumentEmail</u2:DocumentKind>
  <u2:EnvelopeVis/>
  <u2:Compatibility>
   <u2:BreakWrappedTables/>
   <u2:SnapToGridInCell/>
   <u2:WrapTextWithPunct/>
   <u2:UseAsianBreakRules/>
  </u2:Compatibility>
  <u2:BrowserLevel>MicrosoftInternetExplorer4</u2:BrowserLevel>
 </u2:WordDocument>
</xml><![endif]-->

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>I ordered and received six =
straight,
12-inch, tuned exhaust pipes &#8211; stainless, with a generous flange =
and a
reinforced collar.&nbsp;I have talked to a few structural welders for =
ideas of
brackets to tie them to the engine.&nbsp;Each one of them examined the
installation and told me they wouldn&#8217;t do anything.&nbsp;They said =
I
should just let them hang (with the exception of a safety cable on each, =
in
case they broke away.<u3:p></u3:p></span></font><o:p></o:p></p>

</div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'><u3:p></u3:p>Their =
reasoning is
this:The exhaust tubes become part of the engine.They will move and =
vibrate
with the engine and a 12&#8221; extension does not hang down far enough =
to
create a mechanical &#8220;disadvantage&#8221;.They say if I tie them to =
the
engine, I could actually create a weak spot, causing it to stress at =
that point.<u3:p></u3:p></span></font>
<o:p></o:p></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'><u3:p></u3:p>I am not a =
welder, nor
have I had personal experience with straight pipes hanging 12 inches off =
of an
engine.Can I get some feedback?&nbsp;<u3:p></u3:p></span></font> =
<o:p></o:p></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><u3:p></u3:p><font =
size=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>I plan on =
using a safety
cable but should I go further?<u3:p></u3:p><o:p></o:p></span></font></p>

</blockquote>

<p style=3D'margin-left:.5in'><font size=3D3 face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'>-- <br>
Jim Sower ... Destiny's Plaything <br>
Crossville, TN; Chapter 5 <br>
Long-EZ N83RT, Velocity N4095T <br>
&nbsp; <o:p></o:p></span></font></p>

</div>

</body>

</html>
=00
------_=_NextPart_001_01C3EC6C.22BF7DEF--