X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 5.0.7) with ESMTP id 967247 for flyrotary@lancaironline.net; Sat, 04 Feb 2006 09:40:22 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-025-165.carolina.res.rr.com [24.74.25.165]) by ms-smtp-02-eri0.southeast.rr.com (8.13.4/8.13.4) with SMTP id k14EdYog003297 for ; Sat, 4 Feb 2006 09:39:36 -0500 (EST) Message-ID: <000701c62998$d8d2a890$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Mazda mufflers Date: Sat, 4 Feb 2006 09:39:47 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine Not the final word, but I tried SS Swarf in one of my muffler experiments and while it withstood the heat, I found that after several flights the pulses had hammered it into small lengths and blew most of it out the tail pipe. Inconel might be able to with stand the pulses. Ed ----- Original Message ----- From: "Barry Gardner" To: "Rotary motors in aircraft" Sent: Saturday, February 04, 2006 9:12 AM Subject: [FlyRotary] Re: Mazda mufflers > Lynn's comment brings up an interesting idea. Does anyone know where we > could get Inconel swarf? Does anyone machine Inconel (which I guess would > be difficult)? Could be cheap or free and nearly indestructable muffler > packing material. > > Barry Gardner > Wheaton, IL > > Lehanover@aol.com wrote: > >> In a message dated 2/4/2006 8:08:49 AM Eastern Standard Time, >> rx7ez@yahoo.com writes: >> >> I have a "Welders Blanket" cloth which is supposed to handle over >> 2300 degF. >> I am hoping that I could use that for "glass packing". >> >> The "almost empty can" demonstrated at Tracy Crooks Rotary Roundup >> sounded >> good enough for my needs. >> >> >> >> >> George Graham >> Mazda Rx7ez N4449E >> Sarasota Florida -SRQ >> >> The problem with fillers, or packing if you like is twofold. The usual >> glass like material used in piston engine mufflers, just melts. If you >> catch it quickly, you may get to see the glass balls before they are >> machined away and vanish. >> If you try a ceramic blanket material like I did, you discover that the >> hammering of the exhaust pulses mechanically decomposes that material, or >> any material into fuzz and blows it out. >> The race car muffler has small tubes with thousands of small >> perforations. A 4" perforated tube down through the center, with 5 >> additional smaller perf tubes inside of that tube. Still under 100 dB at >> 50 feet after 7 years of service. It looks like the Burns mufflers but is >> very much larger and is about 27 pounds. The Burns mufflers look like the >> way to go to me. They offer stainless swarf packings which might hold up >> for quite a while. >> Years ago, there were mufflers (very big and heavy) used in Mazda race >> cars that had Lava Rock fillings. There was a bung with a screw in plug >> so you could refill the lava rock after each race. The Mazda just turns >> it into dust with the hammering. >> Lynn E. Hanover > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >