X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3871584 for flyrotary@lancaironline.net; Thu, 01 Oct 2009 17:03:24 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (sv1-1.per.aanet.com.au [203.24.100.68]) by poplet2.per.eftel.com (Postfix) with ESMTP id A6C321737E1 for ; Fri, 2 Oct 2009 05:02:49 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id A7D84BEC00D for ; Fri, 2 Oct 2009 05:02:48 +0800 (WST) Message-ID: <82470D8335004A33B8BEEFBA2BFCA09E@ownerf1fc517b8> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] "20B/13B Exhaust Inserts" was Quiet is Deafening Date: Fri, 2 Oct 2009 06:57:53 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0057_01CA432D.A99D0630" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 090930-0, 09/30/2009), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0057_01CA432D.A99D0630 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Kelly, I believe their there to make the exhaust quieter, something to do with = breaking up the shock wave. They also may be restrictive. George ( down under) Mark, Has anyone ever explained the reasoning for the odd "D" shape of the = stock "Cosmo" 20B/13B rotor housing exhaust inserts ??.....................Inquiring minds want to = know !!.................. -- Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 -------------- Original message from Mark Steitle = : --------------=20 I may end up with a turbo, but I'm hoping the tangential muffler = will work well enough to keep that option off the table. I'm also = building a new p-port engine to replace the stock 3-rotor, so I really = don't anticipate needing any more hp. This time I plan to leave the = stock exhaust splitters in the rotor housings. =20 Mark On Thu, Oct 1, 2009 at 11:02 AM, John Slade = wrote: >What kind of muffler are you running? Is it working? =20 Its a Turbonetics T04 turbo, and yes, it works quite well. Also = has a few other side benefits. :) Of course, building the airplane out of foam and fiberglass rather = than metal helps deaden the vibrations too. Regards, John=20 Mark Steitle wrote:=20 John, What kind of muffler are you running? Is it working? =20 Mark On Thu, Oct 1, 2009 at 10:48 AM, John Slade = wrote: >You just need to fly at Mach 1 so you stay ahead of the = sound. No need to go Mach 1. Just put the engine on the back, where = it's supposed to be. :) -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_0057_01CA432D.A99D0630 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Kelly,
I believe their there to make the = exhaust=20 quieter, something to do with breaking up the shock wave. They also may = be=20 restrictive.
George ( down under)
Mark,
  Has anyone ever explained the reasoning for the odd = "D" shape=20 of the stock "Cosmo" 20B/13B rotor
housing exhaust inserts ??.....................Inquiring minds = want to=20 know !!..................
--
Kelly Troyer
"Dyke = Delta"_13B=20 ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil = Manifold=20



 
--------------=20 Original message from Mark Steitle <msteitle@gmail.com>:=20 --------------

I may end up with a turbo, but I'm hoping the tangential = muffler will=20 work well enough to keep that option off the table.  I'm also = building=20 a new p-port engine to replace the stock 3-rotor, so I really = don't=20 anticipate needing any more hp.  This time = I plan=20 to leave the stock exhaust splitters in the rotor = housings. =20
 
Mark

On Thu, Oct 1, 2009 at 11:02 AM, John Slade = <jslade@canardaviation.com&g= t;=20 wrote:
>What kind of muffler are you running?  Is it = working? =20
Its a Turbonetics T04 turbo, and yes, it works quite = well.  Also=20 has a few other side benefits. :)
Of course, building the = airplane out=20 of foam and fiberglass rather than metal helps deaden the = vibrations=20 too.
Regards,
John=20


Mark Steitle wrote:=20
John,
 
What kind of muffler are you running?  Is it = working? =20

Mark
On Thu, Oct 1, 2009 at 10:48 AM, John = Slade <jslade@canardaviation.com> = wrote:
>You just need to fly at Mach 1 so you stay = ahead of=20 the sound.
No need to go Mach 1. Just put the engine on the = back,=20 where it's supposed to be. :)


--

Homepage:  http://www.flyrotary.com/

Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.htm=
l



------=_NextPart_000_0057_01CA432D.A99D0630--