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Date: Sat, 20 Nov 2010 08:35:32 -0600
Message-ID: <AANLkTikWeJ-8oX7bLfkcc1h_a1NE_J=ebWSKf91zW6rc@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Tangential Muffler
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=0015174c3e5074e60904957cef28

--0015174c3e5074e60904957cef28
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Lynn,

Interesting point.  I had never really considered that aspect of exhaust
design.

What ID tube works best for a p-port?

Mark

On Sat, Nov 20, 2010 at 6:37 AM, <Lehanover@aol.com> wrote:

>  In a message dated 11/20/2010 6:33:32 A.M. Eastern Standard Time,
> msteitle@gmail.com writes:
>
> The positive news is that I picked up 10-12 mph on top speed!  So, it
> confirms my suspicions that the tangential muffler is too restrictive for my
> engine.  While definitely not optimal, the 3-into-1 design is clearly better
> than the tangential muffler when it comes to making power.
>
> So, my plan is to build another exhaust from 625 inconel, making all three
> runners 31.5".  I haven't decided what I will use for a muffler.  I'll
> report back when I have more data.
>
> Mark
>
>  Equally spaced pulses from identical length tubes joined at the same
> angles, while still loud will sound less irritating, and might be easier to
> muffle.  Uneven lengths and angles sound like fingernails on a black board.
>
> Lynn E. Hanover
>

--0015174c3e5074e60904957cef28
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Content-Transfer-Encoding: quoted-printable

Lynn,=A0<div><br></div><div>Interesting point. =A0I had never really consid=
ered that aspect of exhaust design. =A0</div><div><br></div><div>What ID tu=
be works best for a p-port? =A0</div><div><br></div><div>Mark<br><br><div c=
lass=3D"gmail_quote">
On Sat, Nov 20, 2010 at 6:37 AM,  <span dir=3D"ltr">&lt;<a href=3D"mailto:L=
ehanover@aol.com">Lehanover@aol.com</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex;">




<div style=3D"font-family:Arial;color:#000000;font-size:10pt"><font color=
=3D"#000000" size=3D"2" face=3D"Arial"><div class=3D"im">
<div>
<div>In a message dated 11/20/2010 6:33:32 A.M. Eastern Standard Time,=20
<a href=3D"mailto:msteitle@gmail.com" target=3D"_blank">msteitle@gmail.com<=
/a> writes:</div>
<blockquote style=3D"border-left:blue 2px solid;padding-left:5px;margin-lef=
t:5px"><font style=3D"background-color:transparent" color=3D"#000000" size=
=3D"2" face=3D"Arial">
  <div>The positive news is that I picked up 10-12 mph on top speed! =A0So,=
=20
  it confirms my suspicions that the tangential muffler is too restrictive =
for=20
  my engine. =A0While definitely not optimal, the 3-into-1 design is clearl=
y=20
  better than the tangential muffler when it comes to making power. =A0=20
  =A0=20
  <div><br></div>
  <div>So, my plan is to build another exhaust from 625 inconel, making all=
=20
  three runners 31.5&quot;. =A0I haven&#39;t decided what I will use for a =
muffler.=20
  =A0I&#39;ll report back when I have more data. =A0</div>
  <div><br></div>
  <div>Mark</div></div></font></blockquote></div>
<div></div>
</div><div>Equally spaced pulses from identical length tubes joined at the =
same=20
angles, while still loud will sound less irritating, and might be easier to=
=20
muffle.=A0 Uneven lengths and angles sound like fingernails on a black boar=
d.=20
</div>
<div>=A0</div>
<div>Lynn E. Hanover</div></font></div>
</blockquote></div><br></div>

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