X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from ms-smtp-03.southeast.rr.com ([24.25.9.102] verified) by logan.com (CommuniGate Pro SMTP 5.1.6) with ESMTP id 1854079 for flyrotary@lancaironline.net; Wed, 21 Feb 2007 17:31:25 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-03.southeast.rr.com (8.13.6/8.13.6) with SMTP id l1LMTaiu021505 for ; Wed, 21 Feb 2007 17:29:37 -0500 (EST) Message-ID: <000901c75607$c50d2000$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Another exploding cigar?? Date: Wed, 21 Feb 2007 17:29:36 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C755DD.DBE611D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C755DD.DBE611D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks, Jason. My experiments with the Swiss muffler did not work out - mainly because = the shock wave from the turbo housing exhaust port simply pulverized any = material in the system. I tried stainless steel coarse wool as well as = a 2000 deg ceramic stuffing. Both could survive the heat and materially = reduce the harshness of the exhaust bark - but none would live past a = couple of weeks. Pulverized and blown out the end. But, that was my = experience, hopefully you will have better results. I would suggest = anything you can do to break up the shock pulse before it gets to any = sound absorption material the longer it will live. Ed ----- Original Message -----=20 From: Hutchison, Jason=20 To: Rotary motors in aircraft=20 Sent: Wednesday, February 21, 2007 1:37 PM Subject: [FlyRotary] Re: Another exploding cigar?? Guys, =20 I tried the cone from Jegs on my original Tangential muffler. = Observers said there was no noticeable difference. I am working on a = "Swiss" muffler now, and I'm planning on trying it again. =20 Jason =20 p.s. I am closing in on the 60 hr mark now. All systems good. Cooling = is still working a little too good 145-150 degrees cruise. Waiting for = hot weather! =20 -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20 Sent: Wednesday, February 21, 2007 11:34 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Another exploding cigar?? =20 Hi John, =20 I have often thought that perhaps two of those cones in a 3" tube = might provide sufficient lowering of the noise level. However, having = two tubes, that would mean 4 cones and a bit expensive. =20 Tracy has had very good luck with the Flow Master Hush Power II. It = has about the best streamline combined with good sound suppression. = Tracy reported it not quite as good as the Spintech on the sound = suppression but better with less drag (and less cost). =20 Ed ----- Original Message -----=20 From: John Downing=20 To: Rotary motors in aircraft=20 Sent: Wednesday, February 21, 2007 8:27 AM Subject: [FlyRotary] Re: Another exploding cigar?? =20 Lynn, you may have the small idea for a round spintech in your = Borla. I had the thought after looking at the cone in Jegs hot rod = catalog. Has anyone tried one of these cones, the smallest one is 3" in = diameter and is $69. If it would stand the hammering it could be = mounted in a 6 or 7" piece of stainless pipe and should not be weight = restrictive. JohnD ----- Original Message -----=20 From: Lehanover@aol.com=20 To: Rotary motors in aircraft=20 Sent: Wednesday, February 21, 2007 12:02 AM Subject: [FlyRotary] Re: Another exploding cigar?? =20 In a message dated 2/20/2007 7:46:37 P.M. Eastern Standard Time, = downing.j@sbcglobal.net writes: I welcome any and all comments and criticism, as I stated, I = don't have a clue how this will work. JohnD =20 I think this will be rejected out of hand. Just enough flow to get = off idle but no more. So now we have a 4" Borla stainless.=20 =20 For the lower RPM the smaller core diameter would be OK. But the = least amount of restriction possible is far better.=20 =20 The Spintech worked. It just had a bad shape. How about a round = Spintech? =20 Lynn E. Hanover=20 -------------------------------------------------------------------------= - Check out free AOL. Most comprehensive set of free safety and = security tools, millions of free high-quality videos from across the = web, free AOL Mail and much more. ------=_NextPart_000_0006_01C755DD.DBE611D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks, Jason.
 
My experiments with the Swiss muffler did not = work out -=20 mainly because the shock wave from the turbo housing exhaust port simply = pulverized any material in the system.  I tried stainless steel = coarse wool=20 as well as a 2000 deg ceramic stuffing.  Both could survive the = heat and=20 materially reduce the harshness of the exhaust bark - but none would = live past a=20 couple of weeks.  Pulverized and blown out the end.  But, that = was my=20 experience, hopefully you will have better results.  I would = suggest=20 anything you can do to break up the shock pulse before it gets to any = sound=20 absorption material the longer it will live.
 
Ed
----- Original Message -----
From:=20 Hutchison, = Jason=20
Sent: Wednesday, February 21, = 2007 1:37=20 PM
Subject: [FlyRotary] Re: = Another=20 exploding cigar??

Guys,

 

I tried the = cone from=20 Jegs on my original Tangential muffler. Observers said there was no = noticeable=20 difference. I am working on a "Swiss" muffler now, and I'm planning on = trying=20 it again.

 

Jason

 

p.s. I am = closing in=20 on the 60 hr mark now. All systems good. Cooling is still working a = little too=20 good 145-150 degrees cruise. Waiting for hot=20 weather!

 

From:=20 Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net]
Sent: Wednesday, February 21, = 2007 11:34=20 AM
To: = Rotary motors in aircraft
Subject: [FlyRotary] Re: = Another=20 exploding cigar??

 

Hi=20 John,

 

I have = often thought=20 that perhaps two of those cones in a 3" tube might provide sufficient = lowering=20 of the noise level.  However, having two tubes, that would mean 4 = cones=20 and a bit expensive.

 

Tracy has had=20 very good luck with the Flow Master Hush Power II.  It has about = the best=20 streamline combined with good sound suppression.  Tracy = reported it not=20 quite as good as the Spintech on the sound suppression but better with = less=20 drag (and less cost).

 

Ed

----- = Original=20 Message -----

From: John=20 Downing

To: Rotary motors in = aircraft=20

Sent: = Wednesday,=20 February 21, 2007 8:27 AM

Subject: = [FlyRotary] Re:=20 Another exploding cigar??

 

Lynn, you may=20 have the small idea for a round spintech in your Borla.  = I had the=20 thought after looking at the cone in Jegs hot rod catalog.  Has = anyone=20 tried one of these cones, the smallest one is 3" in diameter and is=20 $69.  If it would stand the hammering it could be mounted in a = 6 or 7"=20 piece of stainless pipe and should not be weight restrictive. =20 JohnD

----- = Original=20 Message -----

From: Lehanover@aol.com=20

To: Rotary motors in = aircraft=20

Sent: = Wednesday,=20 February 21, 2007 12:02 AM

Subject: = [FlyRotary] Re:=20 Another exploding cigar??

 

In=20 a message dated 2/20/2007 7:46:37 P.M. Eastern Standard Time, downing.j@sbcglobal.net=20 writes:

I = welcome any=20 and all comments and criticism, as I stated, I don't have a clue = how=20 this will work.  JohnD

 

I = think this=20 will be rejected out of hand. Just enough flow to get off idle but = no=20 more.  So now we have a 4" Borla stainless.=20

 

For = the lower=20 RPM the smaller core diameter would be OK. But the least amount of = restriction possible is far better. =

 

The = Spintech=20 worked. It just had a bad shape. How about a round=20 Spintech?

 

Lynn = E.=20 Hanover 





Check out free AOL. Most = comprehensive set of free safety and security tools, millions of = free=20 high-quality videos from across the web, free AOL Mail and much=20 = more.

<= /BLOCKQUOTE> ------=_NextPart_000_0006_01C755DD.DBE611D0--