X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost02.isp.att.net ([207.115.11.52] verified) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2636912 for flyrotary@lancaironline.net; Tue, 08 Jan 2008 20:39:36 -0500 Received-SPF: pass receiver=logan.com; client-ip=207.115.11.52; envelope-from=bbradburry@bellsouth.net Received: from arptk8ng400 (adsl-154-183-252.mco.bellsouth.net[72.154.183.252]) by isp.att.net (frfwmhc02) with SMTP id <20080109013855H0200an06ne>; Wed, 9 Jan 2008 01:38:56 +0000 X-Originating-IP: [72.154.183.252] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: Dennis' Muffler Date: Tue, 8 Jan 2008 20:38:56 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002B_01C85236.7DD4AA60" X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16545 Thread-Index: AchSWYP8PKvyntqUTNmaaqc/Tj4pZgABoe3w This is a multi-part message in MIME format. ------=_NextPart_000_002B_01C85236.7DD4AA60 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Has anybody weighed one of these resonators? Ed, do you have one of these on your plane? Is the difference in sound levels of yours and Dennis' plane due to the differences in the 13b and the Renesis? Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson Sent: Tuesday, January 08, 2008 7:49 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Dennis' Muffler No Packing, Kelly. Basically concentric tubes with holes in them. It appears to use acoustical wave damping as a primary sound suppression technique followed by damping from the energy lost caused by the numerous holes. The HushPower resonator is basically 1/2 of the regular HushPower II muffler (also 1/2 its length) Ed ----- Original Message ----- From: Kelly Troyer To: Rotary motors in aircraft Sent: Tuesday, January 08, 2008 6:47 PM Subject: [FlyRotary] Re: Dennis' Muffler Mark, Any info on what the packing is in the "Hushpower"?? Thanks -- Kelly Troyer "Dyke Delta"_13B ROTARY Engine "RWS"_RD1C/EC2/EM2 "Mistral"_Backplate/Oil Manifold -------------- Original message from "Mark Steitle" : -------------- Bill, Here is a cutaway of the Hushpower II Resonator. I'll have to get the dimensions this weekend. The dimensions you quoted are pretty close, but you may need a heat shield, or some Zetex to protect the fiberglass. Mark ------=_NextPart_000_002B_01C85236.7DD4AA60 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Has anybody weighed one of these resonators? =

Ed, do you have one of these on your plane? Is the = difference in sound levels of yours and Dennis’ plane due to the differences in = the 13b and the Renesis?

Bill B

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson
Sent: Tuesday, January = 08, 2008 7:49 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Dennis' Muffler

No Packing, Kelly. Basically concentric tubes = with holes in them. It appears to use acoustical wave damping as a primary sound suppression technique followed by damping from the energy lost caused by the numerous holes. The HushPower = resonator is basically 1/2 of the regular HushPower II muffler (also 1/2 its = length)

Ed

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

From: Kelly Troyer =

To: Rotary motors in aircraft

Sent: = Tuesday, January 08, 2008 6:47 PM

Subject: = [FlyRotary] Re: Dennis' Muffler

= Mark,

Any info on what the packing is in the "Hushpower"??

Thanks

--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold

-------------- = Original message from "Mark Steitle" <msteitle@gmail.com>: --------------

Bill,

Here is a cutaway of the Hushpower II Resonator. I'll have to get = the dimensions this weekend. The dimensions you quoted are pretty = close, but you may need a heat shield, or some Zetex to protect the = fiberglass.

Mark

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