X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-iw0-f173.google.com ([209.85.223.173] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4218351 for flyrotary@lancaironline.net; Mon, 12 Apr 2010 08:25:53 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.223.173; envelope-from=msteitle@gmail.com Received: by iwn3 with SMTP id 3so727489iwn.3 for ; Mon, 12 Apr 2010 05:25:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:received:message-id:subject:from:to:content-type; bh=OmSJa/Sv1DkQlwEygFTMmOWF9k/oC5vEQeFmnAJpP20=; b=Lz0Xu4WKHTJj3pW0iZPkZxGFef2wEgjXqJGMwrrQ5zPJg/krGQmUC91G4sT3dFR27k T3vaaK49alHZVx7ht2G2Y+TN+llGeM3+UPHmt6W9ZZ5a+iFMf+WGZqGwLogQ6KWfQ2hD 1S+/cm/Ly+F5xnSoEc0RHeEaU2RorNvDSp20o= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=UsVQtjEpohBbmZ78OkUWmVQ5WZaFAr+umAnho6FylY7oh0xdo6q8PkdKlm1mn9fn0X 07ERMuIgasuG5VbLqXxtODQ94IQntA8p4jhkmXaM46sljI7g2AyKcBCtRGgZTI1flSVm dYyiAyApvmnnc7yg6eXTLCTHilsAzkoXWyF2s= MIME-Version: 1.0 Received: by 10.231.183.195 with HTTP; Mon, 12 Apr 2010 05:25:17 -0700 (PDT) In-Reply-To: References: Date: Mon, 12 Apr 2010 07:25:17 -0500 Received: by 10.231.153.1 with SMTP id i1mr1879956ibw.35.1271075117565; Mon, 12 Apr 2010 05:25:17 -0700 (PDT) Message-ID: Subject: Re: [FlyRotary] Re: Tangential muffler From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=00504501598bdd87e60484093ce9 --00504501598bdd87e60484093ce9 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Thanks Mike, We'll see if it was all worth it when I can take some sound measurements. One thing this does accomplish is to provide some more cowl exit area as my old system had the muffler protruding through the tunnel, partially blockin= g the exit. On the tangential, only the 2.5" pipe goes through the tunnel. This should help to cool the extra hp from the p-port motor. Mark S. On Sun, Apr 11, 2010 at 9:19 PM, Mike Wills wrote: > Sweet! Mark, I envy your skills. You build nice stuff! > > Mike Wills > > *From:* Mark Steitle > *Sent:* Sunday, April 11, 2010 5:56 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: Tangential muffler > > Bill, > > Here is a shot of the exhaust side of the engine without the heat shield. > All fits together very nicely. > > Mark > > On Sun, Apr 11, 2010 at 7:52 PM, Mark Steitle wrote: > >> Bill, >> >> 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 insi= de >> the larger tube. >> >> Mark >> >> >> On Sun, Apr 11, 2010 at 3:39 PM, Bill Schertz wrot= e: >> >>> 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 >>> *Sent:* Friday, April 09, 2010 7:26 PM >>> *To:* Rotary motors in aircraft >>> *Subject:* [FlyRotary] Re: Tangential muffler >>> >>> Al, >>> >>> 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 >>> >>> >>> >>> 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, >>>> >>>> >>>> >>>> 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 incr= ease >>>> 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 i= nconel >>>> 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 muff= ler >>>> and the engine. >>>> >>>> >>>> >>>> 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 > > --00504501598bdd87e60484093ce9 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Thanks Mike,
=A0
We'll see if it was all worth it when I can take some sound measur= ements.=A0 One thing this does accomplish is to provide some more cowl exit= area as my old system had the muffler protruding through the tunnel, parti= ally blocking the exit.=A0 On the tangential, only the 2.5" pipe goes = through the tunnel.=A0 This should help to cool the extra hp from the p-por= t motor.
=A0
Mark S.
=A0


=A0
On Sun, Apr 11, 2010 at 9:19 PM, Mike Wills <rv-4mike@cox.net&= gt; wrote:
Sweet! Mark, I envy your skills. You build nice= stuff!
=A0
Mike Wills

Sent: Sunday, April 11, 2010 5:56 PM
To: Rotary motors in aircraft <= /div>
Subject: [FlyRotary] Re: Tangential muffler

Bill,=A0=20

Here is a shot of the exhaust side of the engine without the heat shie= ld. =A0All fits together very nicely.=20

Mark

On Sun, Apr 11, 2010 at 7:52 PM, Mark Steitle <msteitle@gmail.com> wrote:
Bill,=A0=20

Here is a picture of the inner pipe of my tangential muffler. =A0Mater= ial is 625 Inconel. =A0If I were to do it over I think I would angle the sl= ots at about 45* so they would scoop the exhaust gases as it swirls around = inside the larger tube. =A0

Mark=20


On Sun, Apr 11, 2010 at 3:39 PM, Bill Schertz <wschertz@comcast.net> wrote:
Could you post a picture of the intern= al pipe, in fact of all the parts?
Bill Schertz
KIS Cruiser #4045
N= 343BS
Phase I testing

Sent: Friday, April 09, 2010 7:26 PM
To: Rotary motors in aircraft <= /div>
Subject: [FlyRotary] Re: Tangential muffler

Al,=A0=20

Per Lynn H., the p-port is very sensitive to exhaust back pressure. = =A0So, I made sure to put lots of V-shaped slots in the inner pipe, 109 to = be exact. =A0My goal with my tangential muffler design was to dissipate the= exhaust heat energy, chop up the exhaust pulses into small pieces while mi= nimizing back pressure. =A0The jury is still out as to how successful I was= at meeting these three goals, but my initial impressions are favorable.

Mark

=A0=A0

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

I=92d expec= t it to be very effective.

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

Is the P-po= rt less sensitive to exhaust back pressure?

=A0

Al

=A0

-----Original Message-----
Fro= m: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] <= span style=3D"FONT-WEIGHT: bold">On Behalf Of Mark Steitle
Sent: Friday, April 09, 201= 0 7:47 AM
To: Rotary mot= ors in aircraft
Subject: [FlyRotary] R= e: Tangential muffler

=A0

Al,=A0

=A0

The slotted tube exits t= hrough the aft end of the muffler. =A0It is 2-1/2" the whole way. =A0I= slotted it after I was unable to drill holes through the SS. =A0Cutting 1&= quot; slits was very easy. =A0After making the cuts, I took a hammer and ch= isel and made a "V" shaped indent on one side of the cut to incre= ase the exit area provided by each cut and to encourage the exhaust gasses = to flow toward the exit. =A0Seems to be working. =A0I'll take some soun= d measurements a little later on.

=A0

Mark

On Fri, Apr 9, 2010 at 1= 1:13 AM, Al Gietzen <ALVentures@cox.net> wrote:

I should make it clear tha= t my tangential muffler uses a slotted tube that runs down through the leng= th of the 5" tube. =A0This tube is also inconel and is welded to both = ends, thereby adding strength to the flat ends. =A0I utilized Lynn's co= upling design to allow for movement between the muffler and the engine. =A0=

=A0

Mark;

This is interesting.=A0 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?=

=A0

Al

=A0


=


--
Homepage:=A0 http://www.flyrotary.com/
Archive and UnSub:=A0=A0 http://mail.lancaironline.net:81/lists/flyrotary/List.html


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