X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtpauth05.mail.atl.earthlink.net ([209.86.89.65] verified) by logan.com (CommuniGate Pro SMTP 4.3.5) with ESMTP id 1028001 for flyrotary@lancaironline.net; Thu, 30 Jun 2005 21:11:12 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.86.89.65; envelope-from=jerryhey@earthlink.net Received: from [71.2.107.92] (helo=earthlink.net) by smtpauth05.mail.atl.earthlink.net with asmtp (Exim 4.34) id 1DoA2y-0002sR-92 for flyrotary@lancaironline.net; Thu, 30 Jun 2005 21:10:24 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=simple; s=test1; d=earthlink.net; h=Date:Subject:Content-Type:Mime-Version:From:To:In-Reply-To:Message-Id:X-Mailer; b=JLfMOlfjBs1/reghfRHUclnyhyW7jDuiWZwhzg69GkJgiVvhRulK85y6kumVRKsO; Date: Thu, 30 Jun 2005 20:12:39 -0500 Subject: Re: [FlyRotary] Re: Sq Muffler Content-Type: multipart/alternative; boundary=Apple-Mail-2-139238778 Mime-Version: 1.0 (Apple Message framework v552) From: Jerry Hey To: "Rotary motors in aircraft" In-Reply-To: Message-Id: <379D8E4A-E9CD-11D9-AE07-0003931B0C7A@earthlink.net> X-Mailer: Apple Mail (2.552) X-ELNK-Trace: 8104856d7830ec6b1aa676d7e74259b7b3291a7d08dfec79289cc4f21214b2efda5edc47fd1aef08350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 71.2.107.92 --Apple-Mail-2-139238778 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=ISO-8859-1; format=flowed Ed, I just got in and found your message. I built a square exhaust=20 system about two years ago. It was cool but I don't know if I even can=20= find a picture. It was never tested so it may have been a bad idea. =20= Just one of those things I did, liked it for awhile and then moved on=20 to something else. I am going to try to find an old photo. Jerry On Thursday, June 30, 2005, at 07:40 PM, Ed Klepeis wrote: > Dear Fellow Rotary people > =A0=A0=A0=A0=A0 I emailed jerry I don't know if he got it. but for = your own info=20 > yes there was a center tube I welded in place and we couldn't run the=20= > tail pipe on tracy's eng it hit his mounting system that is why I=20 > think it was louder than it sould be not a true test. I have been=20 > toying with the idea of a sq muffler because of the sound breaking=20 > down idea. does any one have any ideas good or bad on this subject. > =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 > Regards > =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Ed KLepeis > > ----- Original Message ----- > From: William > To: Rotary motors in aircraft > Sent: Thursday, June 30, 2005 7:27 PM > Subject: [FlyRotary] Re: P Ports working on dyno > > As I recall the old email's on the subject, I think the center tube=20 > was in place, but they removed the rear tube because of test stand=20 > interference. That destroyed the venturi effect (or at least minimized=20= > it) . someone else then took the muffler (Jerry Bass?) and adapted it=20= > to his engine, he found that at slow speed taxi, that some exhaust=20 > came out of the front of the tube. (as I recall) > Bill Schertz > KIS Cruiser # 4045 > > ----- Original Message ----- > From: wrjjrs@aol.com > To: Rotary motors in aircraft > Sent: Thursday, June 30, 2005 2:52 PM > Subject: [FlyRotary] Re: P Ports working on dyno > > Bill, I did get the jpeg and I really like the concept. I never saw=20 > the original VAM. Ed told me about how it was chopped up to fit=20 > Tracy's test engine. I asked what was inside it and he said "nothing."=20= > =A0 Originally I can recall some discussion on the other list about=20 > putting a valve on the inlet to prevent exhaust gas from going the=20 > wrong way when the airplane was not moving. That probably came from a=20= > misunderstanding of your concept. I really like the version you posted=20= > today. Jerry=A0 > Jerry, > =A0It is interesting how you find out about things after the fact. (ED=20= > if your monitoring please let me know if our info is correct) The=20 > entire idea of the VAM concept was to create a venturi to draw the=20 > cool air in! The reason for the donut fron section was it doubled as=20= > an end cap and an inlet bellmouth for the tube. Without the inside=20 > tube I am supprised the thing would draw air at all! I'll send you a=20= > close up drawing I sent PL's list off line. When you get your engine=20= > running it could be worth a re-try. I am supprised Ed missed the=20 > center tube, (if he did), he is a sharp guy and doesn't miss much. The=20= > other possibility is that he made it removable and they took it out=20 > prior to the test. > Bill Jepson > --Apple-Mail-2-139238778 Content-Transfer-Encoding: quoted-printable Content-Type: text/enriched; charset=ISO-8859-1 Ed, I just got in and found your message. I built a square exhaust system about two years ago. It was cool but I don't know if I even can find a picture. It was never tested so it may have been a bad idea. Just one of those things I did, liked it for awhile and then moved on to something else. I am going to try to find an old photo. =20= Jerry On Thursday, June 30, 2005, at 07:40 PM, Ed Klepeis wrote: ArialDear Fellow Rotary people Arial=A0=A0=A0=A0=A0 I emailed jerry = I don't know if he got it. but for your own info yes there was a center tube I welded in place and we couldn't run the tail pipe on tracy's eng it hit his mounting system that is why I think it was louder than it sould be not a true test. I have been toying with the idea of a sq muffler because of the sound breaking down idea. does any one have any ideas good or bad on this subject. = Arial=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0 Regards = Arial=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Ed KLepeis ----- Original Message ----- From: = 1999,1999,FFFFWilliam= To: 1999,1999,FFFFRotary motors in aircraft Sent: Thursday, June 30, 2005 7:27 PM Subject: [FlyRotary] Re: P Ports working on dyno ArialAs I recall the old email's on the subject, I think the center tube was in place, but they removed the rear tube because of test stand interference. That destroyed the venturi effect (or at least minimized it) . someone else then took the muffler (Jerry Bass?) and adapted it to his engine, he found that at slow speed taxi, that some exhaust came out of the front of the tube. (as I recall) Bill Schertz KIS Cruiser # 4045 ----- Original Message ----- From: = 1999,1999,FFFFwrjjrs@aol.com To: 1999,1999,FFFFRotary motors in aircraft Sent: Thursday, June 30, 2005 2:52 PM Subject: [FlyRotary] Re: P Ports working on dyno Bill, I did get the jpeg and I really like the concept. I never saw the original VAM. Ed told me about how it was chopped up to fit Tracy's test engine. I asked what was inside it and he said "nothing." =A0 Originally I can recall some discussion on the other list about putting a valve on the inlet to prevent exhaust gas from going the wrong way when the airplane was not moving. That probably came from a misunderstanding of your concept. I really like the version you posted today. Jerry=A0 Jerry, =A0It is interesting how you find out about things after the fact. (ED if your monitoring please let me know if our info is correct) The entire idea of the VAM concept was to create a venturi to draw the cool air in! The reason for the donut fron section was it doubled as an end cap and an inlet bellmouth for the tube. Without the inside tube I am supprised the thing would draw air at all! I'll send you a close up drawing I sent PL's list off line. When you get your engine running it could be worth a re-try. I am supprised Ed missed the center tube, (if he did), he is a sharp guy and doesn't miss much. The other possibility is that he made it removable and they took it out prior to the test. Bill Jepson = --Apple-Mail-2-139238778--