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Date: Mon, 12 Oct 2009 19:21:06 -0400
Message-ID: <1ab24f410910121621n6981c61cj2ee48f6700b84db@mail.gmail.com>
Subject: Muffling
From: Lynn Hanover <lehanover@gmail.com>
To: flyrotary@lancaironline.net
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Lynn,
  Another thought.............What do you think an "Extractor" system (In my
"Delta's" case
one on each side of the bottom "V") consisting of large diameter tubes (5-6"
?) exiting
behind the cockpit with 2" tubes down the middle and open to forward motion
and prop
blast would do to noise level ??.............


Kelly Troyer

Just a guess. The sound is conducted out the front of the tube as well as
the back.

Having such a tube around the exit of each pipe might have some good effect.
At least worth a try.

Or even end the pipes inside such a tube as a Swiss muffler. Sound control
with a fabric skin will be tough.

Lynn E. Hanover

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<div>Lynn,</div>
<div>=A0 Another thought.............What do you think an &quot;Extractor&q=
uot; system (In my &quot;Delta&#39;s&quot; case</div>
<div>one on each side of the bottom &quot;V&quot;) consisting of=A0large di=
ameter=A0tubes (5-6&quot; ?)=A0exiting </div>
<div>behind the cockpit with 2&quot; tubes down the middle and open to=A0fo=
rward motion and prop</div>
<div>blast would do to noise level ??.............=A0</div>
<div>=A0</div>
<div>=A0<br>Kelly Troyer </div>
<div>=A0</div>
<div>Just a guess. The sound is conducted out the front of the tube as well=
 as the back. </div>
<div>=A0</div>
<div>Having such a tube around the exit of each pipe might have some good e=
ffect. At least worth a try.=A0</div>
<div>=A0</div>
<div>Or even end the pipes inside such a tube as a Swiss muffler. Sound con=
trol with a fabric skin will be tough.=A0=A0</div>
<div>=A0</div>
<div>Lynn E. Hanover=A0<br></div>

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