X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4217924 for flyrotary@lancaironline.net; Sun, 11 Apr 2010 22:20:23 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao107.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100412021947.IYCU1969.fed1rmmtao107.cox.net@fed1rmimpo03.cox.net> for ; Sun, 11 Apr 2010 22:19:47 -0400 Received: from willsPC ([174.66.169.142]) by fed1rmimpo03.cox.net with bizsmtp id 4SKn1e00234gpFS04SKnkV; Sun, 11 Apr 2010 22:19:47 -0400 X-VR-Score: -100.00 X-Authority-Analysis: v=1.1 cv=yjuDh3Ma92GrVaJxYD7gfORM7ilP1Knqouyx6SOEBcg= c=1 sm=1 a=PyNjkaOVL4wA:10 a=cPUexvdKvEVW1PN6gG+JiA==:17 a=pGLkceISAAAA:8 a=C_IRinGWAAAA:8 a=kviXuzpPAAAA:8 a=Ia-xEzejAAAA:8 a=7g1VtSJxAAAA:8 a=lscUe8RncDrS4mLc8fUA:9 a=UaLWROmWPVWwcbQXH4UA:7 a=Va6cNAhy1WQDZkTXeTh1qUNPwaIA:4 a=pILNOxqGKmIA:10 a=Qa1je4BO31QA:10 a=MSl-tDqOz04A:10 a=si9q_4b84H0A:10 a=4vB-4DCPJfMA:10 a=EzXvWhQp4_cA:10 a=LdnrYUUKA6A2OgAI:21 a=oQErNrvRFt0D7Z5B:21 a=BOxGfcrCd2te6gFNE0gA:9 a=Be5UkDP6fMAMfjTPteoA:7 a=dE7EiPO-etISf301v9tpdasZvosA:4 a=cPUexvdKvEVW1PN6gG+JiA==:117 X-CM-Score: 0.00 Message-ID: From: "Mike Wills" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Tangential muffler Date: Sun, 11 Apr 2010 19:19:45 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0044_01CAD9AB.F22338B0" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8089.726 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726 This is a multi-part message in MIME format. ------=_NextPart_000_0044_01CAD9AB.F22338B0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Sweet! Mark, I envy your skills. You build nice stuff! Mike Wills From: Mark Steitle=20 Sent: Sunday, April 11, 2010 5:56 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Tangential muffler Bill, =20 Here is a shot of the exhaust side of the engine without the heat = shield. All fits together very nicely.=20 Mark On Sun, Apr 11, 2010 at 7:52 PM, Mark Steitle = wrote: Bill, =20 Here is a picture of the inner pipe of my tangential muffler. = Material is 625 Inconel. If I were to do it over I think I would angle = the slots at about 45* so they would scoop the exhaust gases as it = swirls around inside the larger tube. =20 Mark=20 On Sun, Apr 11, 2010 at 3:39 PM, Bill Schertz = wrote: Could you post a picture of the internal pipe, in fact of all the = parts? Bill Schertz KIS Cruiser #4045 N343BS Phase I testing From: Mark Steitle=20 Sent: Friday, April 09, 2010 7:26 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Tangential muffler Al, =20 Per Lynn H., the p-port is very sensitive to exhaust back pressure. = So, I made sure to put lots of V-shaped slots in the inner pipe, 109 to = be exact. My goal with my tangential muffler design was to dissipate = the exhaust heat energy, chop up the exhaust pulses into small pieces = while minimizing back pressure. The jury is still out as to how = successful I was at meeting these three goals, but my initial = impressions are favorable. Mark =20 On Fri, Apr 9, 2010 at 12:29 PM, Al Gietzen = wrote: I=92d expect it to be very effective. Is the total area of the slots =3D or > than the x-section of the = 2 =BD=94 pipe? Is the P-port less sensitive to exhaust back pressure? Al -----Original Message----- From: Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle Sent: Friday, April 09, 2010 7:47 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Tangential muffler Al,=20 The slotted tube exits through the aft end of the muffler. It is = 2-1/2" the whole way. I slotted it after I was unable to drill holes = through the SS. Cutting 1" slits was very easy. After making the cuts, = I took a hammer and chisel and made a "V" shaped indent on one side of = the cut to increase the exit area provided by each cut and to encourage = the exhaust gasses to flow toward the exit. Seems to be working. I'll = take some sound measurements a little later on. Mark On Fri, Apr 9, 2010 at 11:13 AM, Al Gietzen = wrote: I should make it clear that my tangential muffler uses a slotted = tube that runs down through the length of the 5" tube. This tube is = also inconel and is welded to both ends, thereby adding strength to the = flat ends. I utilized Lynn's coupling design to allow for movement = between the muffler and the engine. =20 Mark; This is interesting. Would you care to give a bit more info =96 = or perhaps provide a sketch? Where is the exit from the muffler? Does = the exhaust exit through the slotted tube? How big is the tube? Al -------------------------------------------------------------------------= ------- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_0044_01CAD9AB.F22338B0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Sweet! Mark, I envy your skills. You build = nice=20 stuff!
 
Mike Wills

Sent: Sunday, April 11, 2010 5:56 PM
Subject: [FlyRotary] Re: Tangential = muffler

Bill, =20

Here is a shot of the exhaust side of the engine without the heat = shield.=20  All fits together very nicely.=20

Mark

On Sun, Apr 11, 2010 at 7:52 PM, Mark Steitle = <msteitle@gmail.com> = wrote:
Bill, =20

Here is a picture of the inner pipe of my tangential muffler.=20  Material is 625 Inconel.  If I were to do it over I think I = would=20 angle the slots at about 45* so they would scoop the exhaust gases as = it=20 swirls around inside the larger tube.  

Mark=20


On Sun, Apr 11, 2010 at 3:39 PM, Bill Schertz = <wschertz@comcast.net> wrote:
Could you post a picture of the = internal pipe,=20 in fact of all the parts?
Bill Schertz
KIS Cruiser=20 #4045
N343BS
Phase I testing

From: Mark Steitle =
Sent: Friday, April 09, 2010 7:26 PM
Subject: [FlyRotary] Re: Tangential = muffler

Al, =20

Per Lynn H., the p-port is very sensitive to exhaust back = pressure.=20  So, I made sure to put lots of V-shaped slots in the inner = pipe, 109=20 to be exact.  My goal with my tangential muffler design was to=20 dissipate the exhaust heat energy, chop up the exhaust pulses into = small=20 pieces while minimizing back pressure.  The jury is still out = as to how=20 successful I was at meeting these three goals, but my initial = impressions=20 are favorable.

Mark

  

On Fri, Apr 9, 2010 at 12:29 PM, Al Gietzen = <ALVentures@cox.net> wrote:

I=92d = expect it=20 to be very effective.

Is = the total=20 area of the slots =3D or > than the x-section of the 2 =BD=94=20 pipe?

Is = the P-port=20 less sensitive to exhaust back pressure?

 

Al

 

-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Mark = Steitle
Sent: Friday, April 09, = 2010 7:47=20 AM
To: Rotary = motors in=20 aircraft
Subject: = [FlyRotary]=20 Re: Tangential muffler

 

Al, 

 

The = slotted tube=20 exits through the aft end of the muffler.  It is 2-1/2" the = whole=20 way.  I slotted it after I was unable to drill holes through = the SS.=20  Cutting 1" slits was very easy.  After making the cuts, = I took=20 a hammer and chisel and made a "V" shaped indent on one side of = the cut to=20 increase the exit area provided by each cut and to encourage the = exhaust=20 gasses to flow toward the exit.  Seems to be working. =  I'll take=20 some sound measurements a little later on.

 

Mark

On Fri, = Apr 9, 2010=20 at 11:13 AM, Al Gietzen <ALVentures@cox.net> = wrote:

I should = make it=20 clear that my tangential muffler uses a slotted tube that runs = down=20 through the length of the 5" tube.  This tube is also inconel = and is=20 welded to both ends, thereby adding strength to the flat ends. =  I=20 utilized Lynn's coupling design to allow for movement between the = muffler=20 and the engine.  

 

Mark;

This = is=20 interesting.  Would you care to give a bit more info =96 or = perhaps=20 provide a sketch? Where is the exit from the muffler? Does the = exhaust=20 exit through the slotted tube? How big is the = tube?

 

Al

 

=



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