X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.123] verified) by logan.com (CommuniGate Pro SMTP 5.2.11) with ESMTP id 3412363 for flyrotary@lancaironline.net; Mon, 05 Jan 2009 23:12:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.123; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta01.mail.rr.com with ESMTP id <20090106041150.QTLY17716.cdptpa-omta01.mail.rr.com@computername> for ; Tue, 6 Jan 2009 04:11:50 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: 20B install issues overcome Date: Mon, 5 Jan 2009 23:11:56 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0016_01C96F8B.0174D120" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AclvrQH6A8l6OXxISiWkaGbFjiBZNAAB6F2w X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 In-Reply-To: Message-Id: <20090106041150.QTLY17716.cdptpa-omta01.mail.rr.com@computername> This is a multi-part message in MIME format. ------=_NextPart_000_0016_01C96F8B.0174D120 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Mike, I have a friend who flies a rotary powered GlasStar who tried the Trapps with about the same results - he took them off As best I recall, he said when there were enough plates to give him his power it was too loud. When there were few enough plates to quite the sound, the power was knocked down. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills Sent: Monday, January 05, 2009 10:15 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: 20B install issues overcome At one point a few months ago I added a SuperTrapp to my existing exhaust just to see if it would tame it a little. Cost me about 500RPM on the top end with little or no improvement in the sound output. Mike Wills ----- Original Message ----- From: wrjjrs@aol.com To: Rotary motors in aircraft Sent: Monday, January 05, 2009 11:49 AM Subject: [FlyRotary] Re: 20B install issues overcome Earnest, I believe that the SuperTrapp muffler is an example of a band gap device and it worked well, if properly tuned. I think the large block idea has merit too, but you will have to allow enough thickness to prevent the tubes that see the exhaust first to fight the harmonic vibration and heat. Different size diamonds in the exhaust stream might also help fight harmonics. Bill Jepson _____ Get a free MP3 every day with the Spinner.com Toolbar. Get it Now. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ------=_NextPart_000_0016_01C96F8B.0174D120 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Mike, I have a friend who flies a = rotary powered GlasStar who tried the Trapps with about the same results = – he took them off

 

As best I recall, he said when = there were enough plates to give him his power it was too loud.  When there = were few enough plates to quite the sound, the power was knocked = down.

 

Ed

 

Ed Anderson

Rv-6A N494BW Rotary = Powered

Matthews, NC

eanderson@carolina.rr.com=

http://www.andersonee.com

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.dmack.net/mazda/index.html<= font size=3D2 face=3DArial>

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills
Sent: Monday, January 05, = 2009 10:15 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = 20B install issues overcome

 

At one point a few months ago I added a SuperTrapp to = my existing exhaust just to see if it would tame it a little. Cost me about = 500RPM on the top end with little or no improvement in the sound = output.

 

Mike Wills

----- Original Message ----- =

From: wrjjrs@aol.com =

Sent: Monday, = January 05, 2009 11:49 AM

Subject: = [FlyRotary] Re: 20B install issues overcome

 

Earnest,
I believe that the SuperTrapp muffler is an example of a band gap device = and it worked well, if properly tuned.
I think the large block idea has merit too, but you will have to allow = enough thickness to prevent the tubes that see the exhaust first to fight the = harmonic vibration and heat. Different size diamonds in the exhaust stream might = also help fight harmonics.
Bill Jepson

 

=

Get a free MP3 every day with = the Spinner.com Toolbar. Get it Now.



__________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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