Sent: Thu, 30 Jun 2005 14:45:27 -0400 Subject: [FlyRotary] Muffler I believe if the whole thing was made by using square, or out of round = pipes and shapes it will reduce the noise better. Maybe that?s why there is no square brass musing instruments? Their = horns are all round to amplify the sound. Buly=20 -------------------------------------------------------------------------= ----- >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0094_01C57DAC.80FC1C20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I have a tangential muffler on my SOOB, = and it is=20 extremely quiet. Nothing inside, just gestimated inlet/outlet pipes. It = also=20 works on the single rotor on the test stand.

Richard Sohn
N-2071U

----- Original Message -----

From:=20 wrjjrs@aol.com

To: Rotary motors in = aircraft

Sent: Thursday, June 30, 2005 = 12:13=20 PM

Subject: [FlyRotary] Re: = Muffler

Buly, Interestingly the muffler used by Jabaru is a = tangential style=20 with a flat side. Fairly quiet too. I did a drawing showing how = it will=20 look on Jerry's through-and-through cool tube style.

Bill Jepson

-----Original Message-----
From: = Bulent=20 Aliev <atlasyts@bellsouth.net>
= To:=20 Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent:=20 Thu, 30 Jun 2005 14:45:27 -0400
Subject: [FlyRotary] = Muffler

I = believe if=20 the whole thing was made by using square, or out of round pipes and = shapes it=20 will reduce the noise better.
Maybe that?s why there is no square = brass=20 musing instruments? Their horns are all round to amplify the=20 sound.
Buly

>> Homepage: =20 http://www.flyrotary.com/
>> Archive: =20 = http://lancaironline.net/lists/flyrotary/List.html
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