X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [129.116.87.143] (HELO MAIL01.austin.utexas.edu) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 923866 for flyrotary@lancaironline.net; Thu, 12 Jan 2006 11:44:00 -0500 Received-SPF: none receiver=logan.com; client-ip=129.116.87.143; envelope-from=mark.steitle@austin.utexas.edu X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C61797.48B975E2" Subject: RE: [FlyRotary] Re: Cool Tube Muffler Sound Readings Date: Thu, 12 Jan 2006 10:43:15 -0600 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E036103F1@MAIL01.austin.utexas.edu> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: Cool Tube Muffler Sound Readings Thread-Index: AcYXlhhDMyKt7Sz5Sc2Q1k4kSQkhxgAAQ7dg From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C61797.48B975E2 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Yeah, pistons hitting the cowl make lots of noise,... then silence. (ask me how I know this) =20 Mark =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Russell Duffy Sent: Thursday, January 12, 2006 10:34 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Cool Tube Muffler Sound Readings =20 I would like to take some readings from a certified engine for comparison. I measured 104db at 3000 & 4000 rpm from my spiral flow muffler.=20 =20 I'd bet the average Lycoming would make a lot more noise at 3000-4000 rpm :-) =20 Rusty (free from in-laws until Monday) =20 ------_=_NextPart_001_01C61797.48B975E2 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Yeah, pistons hitting the cowl make = lots of noise,… then silence.  (ask me how I know = this)

 

Mark

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Russell Duffy
Sent: Thursday, January = 12, 2006 10:34 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = Cool Tube Muffler Sound Readings

 

I would like to take some readings from a certified engine for
comparison.   I measured 104db at 3000 & 4000 rpm from my = spiral flow
muffler. 

 

I'd bet the average Lycoming would = make a lot more noise at 3000-4000 rpm :-)

 

Rusty (free from in-laws until = Monday)

 

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