Return-Path: Received: from [65.54.168.114] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 776211 for flyrotary@lancaironline.net; Tue, 08 Mar 2005 22:27:49 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.168.114; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 8 Mar 2005 19:27:04 -0800 Message-ID: Received: from 4.171.150.75 by BAY3-DAV10.phx.gbl with DAV; Wed, 09 Mar 2005 03:27:03 +0000 X-Originating-IP: [4.171.150.75] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Tangential muffler Date: Tue, 8 Mar 2005 22:27:02 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_007A_01C5242D.F37E0DE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Tue, 8 Mar 2005 22:27:02 -0500 X-OriginalArrivalTime: 09 Mar 2005 03:27:04.0251 (UTC) FILETIME=[DD3E00B0:01C52457] This is a multi-part message in MIME format. ------=_NextPart_000_007A_01C5242D.F37E0DE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I'm fresh out of deathless prose but yes, I did use a tangential muffler = for about 800 hours (with non turbo rotor housings. It failed after = about 20 hours on the turbo parts. I'm sure it would last longer with = heavier material (I used .035 321 SS). Heck, cast iron will last = forever if you use enough of it. =20 The 'air cooled exhaust' may work but I must confess that I don't quite = get it. It may work just fine but is it the air or just thicker = material? Also, high pressure air is a very valuable commodity in an = aircraft. Use it wisely. Tracy <... I am fairly certain that is why Tracy removed it ...> I'd like to hear more around that. I heard something about it bulging = out and blowing up when associated with turbo rotor housing, and also = that it might be a little more sound if it had been made of thicker = material. I'd also like someone's estimate of how much ceramic coating = the thing might help with the "oven" phenomenon. I'd like to do it that = way, but am leaning toward turbo rotor housings and have to worry about = that aspect. Tracy? A couple hundred words of deathless prose on this? ... Jim S. Ed Anderson wrote: >Jerry, Tracy Crook flew with a similar Tangential muffler for a = number of >hours. The neat thing is it does fit under the cowl and suppress = sound >nicely, the un-neat thing is it acts like a large oven under the cowl = and >keeps cowl temps highly elevated. I am fairly certain that is why = Tracy >removed it. > >Ed A >> =20 > >>From the "other" list comes the report that someone has tested a >>similar exhaust system to what I have been building on his = PowerSport p >>ported engine. . He reports the muffler worked well to quiet the >>exhaust note and that the engine seemed to breath freely. The neat >>thing about this exhaust system is that it fits inside the cowl. >>Here are a couple of photos showing the muffler on a Mustang 2. The >>muffler is 6" o.d. x 10 inches long. Construction is 321 16 gage. >>The cool tube running through the center is intended to cool the >>exhaust gas. Fresh air is plumbed through it. The engine mount is >>the S-beam. Jerry >> ------=_NextPart_000_007A_01C5242D.F37E0DE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I'm fresh out of deathless prose but yes, I did use a = tangential=20 muffler for about 800 hours (with non turbo rotor housings. It = failed=20 after about 20 hours on the turbo parts. I'm sure it would last=20 longer with heavier material (I used .035 321 SS). Heck, cast = iron=20 will last forever if you use enough of it.

The 'air cooled exhaust' may work but I must confess that I don't = quite=20 get it. It may work just fine but is it the air or just = thicker=20 material? Also, high pressure air is a very valuable commodity in = an=20 aircraft. Use it wisely.

Tracy

<...=20 I am fairly certain that is why Tracy removed it ...>
I'd like = to hear=20 more around that. I heard something about it bulging out and = blowing up=20 when associated with turbo rotor housing, and also that it might be a = little=20 more sound if it had been made of thicker material. I'd also = like=20 someone's estimate of how much ceramic coating the thing might help = with the=20 "oven" phenomenon. I'd like to do it that way, but am leaning = toward=20 turbo rotor housings and have to worry about that = aspect.

Tracy? =20 A couple hundred words of deathless prose on this? ... Jim=20 S.

Ed Anderson wrote:

>Jerry, Tracy Crook = flew with a=20 similar Tangential muffler for a number of
>hours. The = neat thing=20 is it does fit under the cowl and suppress sound
>nicely, the = un-neat=20 thing is it acts like a large oven under the cowl and
>keeps = cowl temps=20 highly elevated. I am fairly certain that is why = Tracy
>removed=20 it.
>
>Ed A
>>
>
>>From the = "other"=20 list comes the report that someone has tested a
>>similar = exhaust=20 system to what I have been building on his PowerSport=20 p
>>ported engine. . He reports the muffler = worked=20 well to quiet the
>>exhaust note and that the engine seemed = to breath=20 freely. The neat
>>thing about this exhaust system is = that it=20 fits inside the cowl.
>>Here are a couple of photos showing = the=20 muffler on a Mustang 2. The
>>muffler is 6" o.d. x 10 inches = long.=20 Construction is 321 16 gage.
>>The cool tube running through = the=20 center is intended to cool the
>>exhaust gas. Fresh air is = plumbed=20 through it. The engine mount is
>>the=20 S-beam. =20 Jerry
>>

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