X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from web31312.mail.mud.yahoo.com ([68.142.198.107] verified) by logan.com (CommuniGate Pro SMTP 5.1.6) with SMTP id 1855333 for flyrotary@lancaironline.net; Thu, 22 Feb 2007 08:06:11 -0500 Received-SPF: none receiver=logan.com; client-ip=68.142.198.107; envelope-from=allenslominski@yahoo.com Received: (qmail 84094 invoked by uid 60001); 22 Feb 2007 13:05:17 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=kbJiqL1BbebWDd8rMiURyQG+s8k+E2qAPRjcwmWdtcawARxL6rXsItsa0Bv9nMVrzupBh9Cic+iM5/Y5CzJhRDbve8TBP6BTHJlFPPh4ZiyJuOtOtEIY5L7l8GAIvqmowkFDp8h1AT47KA7zZgz7HcygFZWNgpYGrqSWWvNTohM=; X-YMail-OSG: JPqxfAkVM1m3HM9VAIYVbwIlD.xzovFn4UNCswcY3hnF7HuYO7tIgipOKbmNxhiTZ8gvZLQDe.o17rFu03BjhIy6vMBrDKYEdcdJU4DJJoFDZyAGJcib72odoVJpjVFnMDvOHXdvUtBKBlk- Received: from [208.110.201.2] by web31312.mail.mud.yahoo.com via HTTP; Thu, 22 Feb 2007 05:05:17 PST Date: Thu, 22 Feb 2007 05:05:17 -0800 (PST) From: Allen Slominski Subject: Re: [FlyRotary] Re: Another exploding cigar?? To: Rotary motors in aircraft In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1535599539-1172149517=:82539" Content-Transfer-Encoding: 8bit Message-ID: <341363.82539.qm@web31312.mail.mud.yahoo.com> --0-1535599539-1172149517=:82539 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Ed, Thanks so much for the info. Since these units actually have names, I assuming they are for purchase. Who reps/manufactures these units. Allen Slominski Houston, TX Ed Anderson wrote: Hi Allen, Yes, the temps get up there a bit. Stainless steel is pretty much the standard although heavy gauge mile steel can work - but generally too heavy for an aircraft. I think the two mufflers already mentioned the FlowMaster Hushpower II and the SpinTech are two that have flown and survived. I do not now of any specs for an exhaust system, it would depend a lot on the type of installation involved. Ed ----- Original Message ----- From: Allen Slominski To: Rotary motors in aircraft Sent: Wednesday, February 21, 2007 9:48 PM Subject: [FlyRotary] Re: Another exploding cigar?? Ed, I'm a newby to the rotary, but I understand that the temps are pretty outrageous also. Somethink like 1700 to 1900 degrees F. Does anyone have a spec or detail for exhaust systems? Mufflers would be nice also. Allen Slominski Houston, TX Ed Anderson wrote: Hi Dave. Basically, the Swiss muffler is attributed to the tough noise abatement rules of the Swiss government for aircraft - including small GA and experimental. Tony Bingelis who wrote a column of "How to" for Sport Aviation for years included it in one of his books "FireWall Forward"-Page 112. The muffler (as shown in his book) was an aluminum tube 3 1/8" in diameter about 4 -5 feet long. A stainless steel mesh was rolled into a smaller diameter tube to be stuck in the middle after fiberglass cloth was wrapped around the mesh tube. This was all stuffed in the 3 1/8" aluminum tube making a very light weight and effective muffler. Sort of a light weight glass-pack muffler. It was then hung under the belly of the aircraft. The problem for the rotary is that the exhaust pulse will pulverize fiberglass (or almost anything else in short time). Again, the problem is not the heat its the power of the exhaust pulse. Hope that explained it. Ed ----- Original Message ----- From: david mccandless To: Rotary motors in aircraft Sent: Wednesday, February 21, 2007 6:44 PM Subject: [FlyRotary] Re: Another exploding cigar?? On 22, Feb , at 6:29 AM, Ed Anderson wrote: Thanks, Jason. My experiments with the Swiss muffler did not work out - Ed Hi Ed, could you explain "Swiss" muffler? TIA, Dave --0-1535599539-1172149517=:82539 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit
Ed,
 
Thanks so much for the info.  Since these units actually have names, I assuming they are for purchase.  Who reps/manufactures these units.
 
Allen Slominski
Houston, TX

Ed Anderson <eanderson@carolina.rr.com> wrote:
Hi Allen,
 
Yes, the temps get up there a bit.  Stainless steel is pretty much the standard although heavy gauge mile steel can work - but generally too heavy for an aircraft.  I think the two mufflers already mentioned the FlowMaster Hushpower II and the SpinTech are two that have flown and survived.   I do not now of any specs for an exhaust system, it would depend a lot on the type of installation involved. 
 
Ed
----- Original Message -----
Sent: Wednesday, February 21, 2007 9:48 PM
Subject: [FlyRotary] Re: Another exploding cigar??

Ed,
 
I'm a newby to the rotary, but I understand that the temps are pretty outrageous also.  Somethink like 1700 to 1900 degrees F.  Does anyone have a spec or detail for exhaust systems?  Mufflers would be nice also.
 
Allen Slominski
Houston, TX

Ed Anderson <eanderson@carolina.rr.com> wrote:
Hi Dave.
 
Basically, the Swiss muffler is attributed to the tough noise abatement rules of the Swiss government for aircraft - including small GA and experimental.  Tony Bingelis who wrote a column of "How to" for Sport Aviation for years included it in one of his books "FireWall Forward"-Page 112.
 
The muffler (as shown in his book) was an aluminum tube 3 1/8" in diameter about 4 -5 feet long.  A stainless steel mesh was rolled into a smaller diameter tube to be  stuck in the middle after  fiberglass cloth was wrapped around the mesh tube.  This was all stuffed in the 3 1/8" aluminum tube making a very light weight and effective muffler.  Sort of a light weight glass-pack muffler.
 
It was then hung under the belly of the aircraft.
 
The problem for the rotary is that the exhaust pulse will pulverize fiberglass (or almost anything else in short time).  Again, the problem is not the heat its the power of the exhaust pulse.
 
Hope that explained it.
 

Ed 
----- Original Message -----
Sent: Wednesday, February 21, 2007 6:44 PM
Subject: [FlyRotary] Re: Another exploding cigar??

On 22, Feb , at 6:29 AM, Ed Anderson wrote:
Thanks, Jason.
My experiments with the Swiss muffler did not work out -
Ed
Hi Ed,
could you explain "Swiss" muffler?
TIA, Dave


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