Return-Path: Received: from [199.185.220.224] (HELO priv-edtnes40.telusplanet.net) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3062429 for flyrotary@lancaironline.net; Thu, 04 Mar 2004 04:16:56 -0500 Received: from Endurance ([216.232.236.240]) by priv-edtnes40.telusplanet.net (InterMail vM.6.00.05.02 201-2115-109-103-20031105) with SMTP id <20040304091651.YYWM18763.priv-edtnes40.telusplanet.net@Endurance> for ; Thu, 4 Mar 2004 02:16:51 -0700 From: "Haywire" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: muffler questions Date: Thu, 4 Mar 2004 01:16:44 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0047_01C40186.5B7D72D0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) x-mimeole: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0047_01C40186.5B7D72D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit If you want the definitive story on the subject, get a copy of "Two-Stroke Tuner's Handbook" by Gordon Jennings. Very interesting but of little use to the rotary enthusiast other than to educate one about how little it applies to our engine of choice. I agree completely with Tracy on this. A few years back when stock snowmobiles just weren't good enough for me, I wasted copious amounts of money on various aftermarket exhaust pipes (amongst other things) in an effort to be top dawg. I discovered that 2-stroke exhaust tuning is very much a black art based in scientific principles, but some pipes worked very well while others that should have simply didn't. However they aren't subject to the same destructive hi-temp/press pulses that the rotary produces, so can be made very light weight. Interestingly though the concept of tuning them is based on reflective pressure pulses not unlike the EDDIE effect :-). So they may have more in common with our (Ed's) intakes than our exhausts? S. Todd Bartrim Turbo 13B RV-9Endurance C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm "Whatever you vividly imagine, Ardently desire, Sincerely believe in, Enthusiastically act upon, Must inevitably come to pass". ------=_NextPart_000_0047_01C40186.5B7D72D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
If you want the definitive story on the = subject, get a=20 copy of "Two-Stroke Tuner's Handbook" by Gordon Jennings.   = Very=20 interesting but of little use to the rotary enthusiast other than to = educate one=20 about how little it applies to our engine of choice.
 
I agree=20 completely with Tracy on this. A few years back when stock = snowmobiles just=20 weren't good enough for me, I wasted copious amounts of money on various = aftermarket exhaust pipes (amongst other things) in an effort to be top = dawg.=20 I = discovered=20 that 2-stroke exhaust tuning is very much a black art based in = scientific=20 principles, but some pipes worked very well while others that = should have=20 simply didn't.
   =20 However they aren't subject to the same destructive hi-temp/press pulses = that=20 the rotary produces, so can be made very light weight. Interestingly = though the=20 concept of tuning them is based on reflective pressure pulses not unlike = the=20 EDDIE effect :-). So they may have more in common with our (Ed's) = intakes than=20 our exhausts?
 

S. Todd Bartrim
Turbo 13B RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

=   =20 "Whatever you vividly imagine, Ardently desire, Sincerely believe in,=20 Enthusiastically act upon, Must inevitably come to pass".

 
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