X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.129.170.194] (HELO VIRCOM1.fcdata.private) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTP id 4952636 for flyrotary@lancaironline.net; Wed, 20 Apr 2011 20:10:17 -0400 Received-SPF: none receiver=logan.com; client-ip=64.129.170.194; envelope-from=cbarber@texasattorney.net Received: from FCD-MAIL06.FCDATA.PRIVATE ([fe80::697f:d6aa:b87:78d8]) by FCD-MAIL05.FCDATA.PRIVATE ([fe80::809d:a06e:5913:452e%15]) with mapi id 14.01.0270.001; Wed, 20 Apr 2011 19:05:05 -0500 From: Chris Barber To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: Tangential Muffler Thread-Topic: [FlyRotary] Re: Tangential Muffler Thread-Index: AQHL/7Zts997//Rb60uJf9A89qU6KJRnb3yA Date: Thu, 21 Apr 2011 00:08:38 +0000 Message-ID: <2D41F9BF3B5F9842B164AF93214F3D3065A5DA2A@FCD-MAIL06.FCDATA.PRIVATE> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [166.139.76.11] Content-Type: multipart/alternative; boundary="_000_2D41F9BF3B5F9842B164AF93214F3D3065A5DA2AFCDMAIL06FCDATA_" MIME-Version: 1.0 --_000_2D41F9BF3B5F9842B164AF93214F3D3065A5DA2AFCDMAIL06FCDATA_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Agreed. My turbo does quiet my rotary down a lot, however, I would not con= sider it quiet. This was reinforced the other day when my buddy Blaine sta= rted up his RV-7 with an Eggenfelder Subaru with essentially the same prop = I have (IVO three blade...his is longer than my pusher) and his engine was = so quiet when I pulled up I did not hear it from the street. about 30 feet = away. This was at idle. Hmmmmm? what about a small muffler after the turbo?? ;-) Chris ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = Al Gietzen [ALVentures@cox.net] Sent: Wednesday, April 20, 2011 7:56 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Tangential Muffler If you're running a turbo you shouldn't need a muffler. The turbo serves t= he purpose of the muffler. Mark A turbo helps, but listen on this video to my 20B and Dave=92s 13b turbo, a= nd Mike=92s 13B NA with some other kind of muffler. http://www.youtube.com/watch?v=3DdibuqenWcOk (Courtesy of Paul Lamar. He did sound measurements and mine was the quiet= est) --_000_2D41F9BF3B5F9842B164AF93214F3D3065A5DA2AFCDMAIL06FCDATA_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

Agreed. My turbo does quiet my rotary down a lot, however, I would= not consider it quiet. This was reinforced the other day when my bud= dy Blaine started up his RV-7 with an Eggenfelder = Subaru with essentially the same prop I have (IVO three blade...his is longer than my = pusher) and his engine was so quiet when I pulled up I did not hear it from= the street. about 30 feet away. This was at idle.=

Hmmmmm? what about a small muffler after the turbo?= ? ;-)

Chris

From: Rotary motors in aircraft [flyrotary= @lancaironline.net] on behalf of Al Gietzen [ALVentures@cox.net]
Sent: Wednesday, April 20, 2011 7:56 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Tangential Muffler

If you're running a turb= o you shouldn't need a muffler. The turbo serves the purpose of = the muffler.

Mark

A turbo hel= ps, but listen on this video to my 20B and Dave<= font face=3D"Verdana" color=3D"blue" size=3D"2">=92s 13b turbo, and Mike=92s 13B NA with some other kind of muffler. <= /p>

http://www.= youtube.com/watch?v=3DdibuqenWcOk

(Cour= tesy of Paul Lamar. He did sound measurements and mine was the quiete= st)

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