X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail15.syd.optusnet.com.au ([211.29.132.196] verified) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTPS id 2638365 for flyrotary@lancaironline.net; Wed, 09 Jan 2008 18:42:33 -0500 Received-SPF: pass receiver=logan.com; client-ip=211.29.132.196; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-224-169.dsl.nsw.optusnet.com.au [220.236.224.169]) by mail15.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id m09Nfkkp029869 for ; Thu, 10 Jan 2008 10:41:48 +1100 Message-ID: <003501c85319$33db7f90$a9e0ecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] URL for HushPower Date: Thu, 10 Jan 2008 09:41:46 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0032_01C8536D.03FE3070" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0032_01C8536D.03FE3070 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Ed, Reflective cone theory is what Bill Jepson and I have designed into our = joint venture exhaust design - although I haven't finished it so I = don't know how well it works. The principle is to maintain a clear passage for the exhaust flow but = redirect the sound waves (which are energy) therefore turning the sound = into heat. In our design the heat is dissipated with cool air flow = through the exhaust and further cool air around the exhaust. However this is not a cheap exhaust to make, as mine is assembled out of = a number of cones ( 1.6mm SS). I think the cost of the cones came to = $200 and then there's the welding. There is also the fact that it is = also not light because of the thickness of the material. The bottom line is that cones by their nature redirect sound energy into = heat. The idea is to not have a direct exit for the sound energy - this = has been achieved in this design by having the sound waves inter the = center of a cone which is blocked-off and is redirected through the = holes and redirected out.=20 So the theory in this design ( HushPower) is sound - excuse the pun. The = packing material merely protects the light outer skin. There will be a = tremendous amount of heat in the inner chambers so I don't know how long = they will last, maybe there thick enough to take it ? However if their = cheap enough just replace them. George ( down under) =20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Thursday, January 10, 2008 4:34 AM Subject: [FlyRotary] URL for HushPower It looks like Hushpower has been spun off from FlowMaster. Here is = the URL for the Hushpower site. http://www.hushpower.com/technology.html 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 -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Free Edition.=20 Version: 7.5.516 / Virus Database: 269.17.13/1214 - Release Date: = 8/01/2008 1:38 PM ------=_NextPart_000_0032_01C8536D.03FE3070 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Ed,
Reflective cone theory is what Bill = Jepson and I=20 have designed into our joint venture exhaust design  - = although I=20 haven't finished it so I don't know how well it works.
The principle is to maintain a clear = passage for=20 the exhaust flow but redirect the sound waves (which are energy)=20 therefore turning the sound into heat. In our design the heat is = dissipated=20 with cool air flow through the exhaust and further cool air around the=20 exhaust.
 
However this is not a cheap exhaust to = make, as=20 mine is assembled out of a number of cones ( 1.6mm SS). I think the cost = of the=20 cones came to $200 and then there's the welding. There is also the fact = that it=20 is also not light because of the thickness of the material.
 
The bottom line is that cones by their = nature=20 redirect sound energy into heat. The idea is to not have a direct exit = for the=20 sound energy - this has been achieved in this design by having the sound = waves=20 inter the center of a cone which is blocked-off and is redirected = through the=20 holes and redirected out.
 
So the theory in this design ( = HushPower) is sound=20 - excuse the pun. The packing material merely protects the light outer = skin.=20 There will be a tremendous amount of heat in the inner chambers so I = don't know=20 how long they will last, maybe there thick enough to take it ? However = if their=20 cheap enough just replace them.
 
George ( down under)
 
 
From:=20 Ed=20 Anderson
Sent: Thursday, January 10, = 2008 4:34=20 AM
Subject: [FlyRotary] URL for=20 HushPower

It looks like Hushpower has been spun off from = FlowMaster.  Here is the URL for the Hushpower site.
 
http://www.hushpower.co= m/technology.html
 
Ed
Ed Anderson
Rv-6A N494BW Rotary = Powered
Matthews,=20 NC
eanderson@carolina.rr.comhttp://www.andersonee.com
http:/= /members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda= /index.html

No virus found in this incoming message.
Checked by AVG Free = Edition.
Version: 7.5.516 / Virus Database: 269.17.13/1214 - = Release Date:=20 8/01/2008 1:38 PM
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