X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost04.isp.att.net ([204.127.217.104] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5528347 for flyrotary@lancaironline.net; Tue, 08 May 2012 16:55:26 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.104; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-74-235-253-90.mco.bellsouth.net[74.235.253.90]) by isp.att.net (frfwmhc04) with SMTP id <20120508205448H0400b6n1je>; Tue, 8 May 2012 20:54:49 +0000 X-Originating-IP: [74.235.253.90] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: Muffler design Date: Tue, 8 May 2012 16:54:50 -0400 Message-ID: <3FDC26BF178B47459FB22D7C203FD5FD@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001B_01CD2D3B.493FC9D0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Ac0tKDveAwERBGgnSWmeNRbNo1ebrQANAHHw X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_001B_01CD2D3B.493FC9D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Earnest, I was wondering about the aerodynamic shape. Do you plan to have it in the airstream? It seems that flat surfaces have been a problem in some other mufflers. You may need to install some ribs or such to strengthen the flat surfaces if they prove to be a problem later?? B2 _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Dwayne Parkinson Sent: Tuesday, May 08, 2012 10:38 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Muffler design Interesting design. I'll be anxious to hear the final decibel numbers. Also, have you figured out a way to measure the back-pressure? That's always a challenge with complex muffler designs. _____ From: Ernest Christley To: Rotary motors in aircraft Sent: Sunday, May 6, 2012 4:35 PM Subject: [FlyRotary] Muffler design I made a series of videos of muffler. It was easier than trying to explain in an email. I've not taken any measurements yet, but subjectively I think it's working well. Even after I turned the injectors around, fuel is still pooling in the intake manifold. I've got a more drastic fix curing right now, so I might have valid numbers in a couple days. http://www.youtube.com/watch?v=n7m6t8ZnUT4 http://www.youtube.com/watch?v=3aUivLupypE http://www.youtube.com/watch?v=CFEO_DEkOWY http://www.youtube.com/watch?v=KPQclfSK4DI -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_001B_01CD2D3B.493FC9D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Earnest,

I was wondering about the = aerodynamic shape. Do you plan to have it in the airstream? It seems = that flat surfaces have been a problem in some other mufflers. You may need = to install some ribs or such to strengthen the flat surfaces if they prove = to be a problem later??

B2

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Dwayne Parkinson
Sent: Tuesday, May 08, = 2012 10:38 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Muffler design

Interesting design. I'll be anxious to hear the final decibel numbers. = Also, have you figured out a way to measure the back-pressure? That's = always a challenge with complex muffler designs.

From: Ernest = Christley <echristley@att.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net> =
Sent: Sunday, May 6, 2012 = 4:35 PM
Subject: [FlyRotary] = Muffler design

I made a series of videos of muffler. It was easier than trying to explain in an email.

I've not taken any measurements yet, but subjectively I think it's = working well. Even after I turned the injectors around, fuel is still = pooling in the intake manifold. I've got a more drastic fix curing right now, = so I might have valid numbers in a couple days.

http://www.youtube.com/watch?v=3Dn7m6t8ZnUT4

http://www.youtube.com/watch?v=3D3aUivLupypE

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

http://www.youtube.com/watch?v=3DKPQclfSK4DI
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html

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