X-Virus-Scanned: clean according to Sophos on Logan.com From: "Andrew Martin" Received: from mail-yw0-f176.google.com ([209.85.161.176] verified) by logan.com (CommuniGate Pro SMTP 6.1.14) with ESMTPS id 9441960 for flyrotary@lancaironline.net; Tue, 07 Feb 2017 22:09:38 -0500 Received-SPF: none receiver=logan.com; client-ip=209.85.161.176; envelope-from=andrew@martinag.com.au Received: by mail-yw0-f176.google.com with SMTP id v200so78809376ywc.3 for ; Tue, 07 Feb 2017 19:09:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=martinag-com-au.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=iMidshDiD/Sk406NRgYlK6+gh/6t6EZRFeGHc7aglIo=; b=mjeFCYRjOMkdB00sJZ1sClM2rKGN8uSDUnWghS/aRjyM1Yl2hjgf0MYsFjXJXctXJT bs5IFBuaMuoX7q+wRZne9ZIWvrFlteYMi1VisbKZxx1gZ5vWaeAVgJ43s2wR56tTflT9 TcQjXzLCInUAOes/h1Eo8VNBfJIcm+hTheTj8tYN6Hd1KKYVcqfT+55tHfseyqV+LCct Z74Gfxrg7zxI0piFAQNGD11Ajn019ALp62SstZR1khQjNMb026gV1C3RlrPPvqJlq/Js zfZKisBUodL9Vh7Yott+ZAfs6LPWd338KHT3xiGJ5IxFzFL94M0uYhoCWpFeiRKrlsm7 bi5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=iMidshDiD/Sk406NRgYlK6+gh/6t6EZRFeGHc7aglIo=; b=gAgui5j+aBqQTnEsXzeZzQ48+7awU2CcBTXA2ZVg/gM0ANMB4/hRmS49AmR8lyguJQ jocN+yk05S9mdbG6+ZayrG9BTpRZLCO3p0iF8ta8YG/HIvp+AbJFFEvohbxVxQdmLYzR Eydmc1dcw1RGrcI175GtkV0Nn/8Zn2qms37BmZ6PCzPcXEd1/WdC6w/qT9Gb8faXXRN/ LkWHYBgoKAM8m5y0+uH4j1wbHHArIlyPCEYHy7cf7Ta+vO+8Pe3GvgMlbaM+100wcg3H 42abos+CS/VxCGMC/vok66ooK5sl8KXBsaMrfYE4hwh62fkgtGK4hCNkbdrCMolzQnD6 pfxQ== X-Gm-Message-State: AMke39lxjlyO2tLx1qcgfwXL1OWU/92cjioOVrhuXQkBY1f1SUCfT9aZVO3LPcSrxGD56GkDYA+LndqWz3CeSg== X-Received: by 10.129.103.137 with SMTP id b131mr14350973ywc.91.1486523362615; Tue, 07 Feb 2017 19:09:22 -0800 (PST) MIME-Version: 1.0 Received: by 10.83.33.215 with HTTP; Tue, 7 Feb 2017 19:08:42 -0800 (PST) X-Originating-IP: [202.40.0.40] In-Reply-To: References: Date: Wed, 8 Feb 2017 11:08:42 +0800 Message-ID: Subject: Re: [FlyRotary] Re: muffler To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001a11490372fad5d10547fc3038 --001a11490372fad5d10547fc3038 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable "Agriculture is my main trade which ,means I have learnt the art of compromise and how to be "rough". It simply has to work, and nothing is perfect." Haha, thats me to a t also. bet you have the same interesting discussions with the TC's & AP's ( apologies for non Aussie forumites, I dont know the equivalent acronyms). Don't get me wrong, I do appreciate well presented machines & understand some try to be perfectionist. but its just not in me to polish wheelnuts. Andrew Regards Andrew Martin +61 0427477144 +61 8 6365 5648 +61 8 9924 1145 andrew@martinag.com.au On Wed, Feb 8, 2017 at 8:13 AM, Neil Unger wrote: > James, Good question on the back pressure. I do not have a clue! I > calculated the amount of 1/4 inch holes to equal the area of the exhaust > manifold and added 50% and kept drilling beyond that until I ran out of > somewhere to drill. IF there is any difference and I expect there may > well be, I no longer care as it fits (just) and seems to run very well. = It > is certainly quiet or quieter! Will the center pipe melt? Again time wi= ll > tell. I also this time did not put EGT probes in as they kept burning of= f > and were a constant source of worry for me simply because I knew. Now I n= o > longer know so I no longer worry, probably like the possible difference i= n > back pressures. Agriculture is my main trade which ,means I have learnt > the art of compromise and how to be "rough". It simply has to work, and > nothing is perfect. Cheers, > > > On 2/8/2017 8:43 AM, James R. Osborn wrote: > >> HI Neil, >> >> I was confused by that photo at first, then realized it is a Renesis >> (side port exhaust), right? So the output of the rear rotor (on the car= , >> not airplane) goes to the center of the muffler and the other two swirl? >> Do you expect any difference in back pressure for the different exits? >> >> =E2=80=94 James >> >> >> >> On Feb 7, 2017, at 12:19 PM, Neil Unger >>> wrote: >>> >>> photos show latest muffler which for some reason has taken the "bark" >>> out of the note. Yet to be fully tested beyond a few hours. All done = with >>> slip joints and 321 S/S. The OZ peasant. Neil >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironline. >>> net:81/lists/flyrotary/List.html >>> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline. >> net:81/lists/flyrotary/List.html >> > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline. > net:81/lists/flyrotary/List.html > --001a11490372fad5d10547fc3038 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
"Agriculture is my main trade which ,m= eans I have learnt the art of=20 compromise and how to be "rough". It simply has to work, and noth= ing is=20 perfect."

Haha, thats me to a t also. bet you have the sa= me interesting discussions with the TC's & AP's ( apologies for= non Aussie forumites, I dont know the equivalent acronyms).

D= on't get me wrong, I do appreciate well presented machines & unders= tand some try to be perfectionist. but its just not in me to polish wheelnu= ts.

Andrew

R= egards

Andrew Martin

+61 0427477144
+61 8 = 6365 5648
+61 8 9924 1145
andrew@martinag.com.au




On Wed, Feb 8, 2017 at 8:13 AM, Neil Unger <= span dir=3D"ltr"><flyrotary@lancaironline.net> wrote:
James,=C2=A0 Good question on the back pressure.=C2=A0= I do not have a clue!=C2=A0 I calculated the amount of 1/4 inch holes to e= qual the area of the exhaust manifold and added 50% and kept drilling beyon= d that until I ran out of=C2=A0 somewhere to drill.=C2=A0 =C2=A0IF there is= any difference and I expect there may well be, I no longer care as it fits= (just) and seems to run very well.=C2=A0 It is certainly quiet or quieter!= =C2=A0 =C2=A0Will the center pipe melt? Again time will tell.=C2=A0 I also = this time did not put EGT probes in as they kept burning off and were a con= stant source of worry for me simply because I knew. Now I no longer know so= I no longer worry, probably like the possible difference in back pressures= .=C2=A0 Agriculture is my main trade which ,means I have learnt the art of = compromise and how to be "rough". It simply has to work, and noth= ing is perfect. Cheers,


On 2/8/2017 8:43 AM, James R. Osborn wrote:
HI Neil,

I was confused by that photo at first, then realized it is a Renesis (side = port exhaust), right?=C2=A0 So the output of the rear rotor (on the car, no= t airplane) goes to the center of the muffler and the other two swirl?=C2= =A0 Do you expect any difference in back pressure for the different exits?<= br>
=E2=80=94 James



On Feb 7, 2017, at 12:19 PM, Neil Unger <flyrotary@lancaironline.net> wrote= :

photos show latest muffler which for some reason has taken the "bark&q= uot; out of the note.=C2=A0 Yet to be fully tested beyond a few hours.=C2= =A0 All done with slip joints and 321 S/S.=C2=A0 The OZ peasant. Neil

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