X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from an-out-0708.google.com ([209.85.132.242] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3612862 for flyrotary@lancaironline.net; Fri, 01 May 2009 11:42:52 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.132.242; envelope-from=wgeslick@gmail.com Received: by an-out-0708.google.com with SMTP id c38so1463604ana.7 for ; Fri, 01 May 2009 08:42:17 -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:message-id:subject:from:to:content-type; bh=BH1CCNMQV3Yy9lEe9QfpW+Bu06sqmLWM82nnnoFt7q0=; b=b8SSvvvV9Z45JHhGpthT2s+1KgIpxh547bKBZzpVhw/2ndZeBkZnLOsJSxk/ZSQcio 4/+yAMjcqp70blpl1HLPCp5l8OQfscNxphX2s55GlvucMD1D5QGIQGdOA5SAtT0RrjZ3 20ZlDKUQNiCnBAxN3V5A0yWRlx85LmEh043Ew= 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=LGlGpi3qm5W/iib6kNElk4g0UiwqQxMMLFZh8xqTERrJ33LEO++y4hLntD/Nt4gPg9 0GIRJr3EYcSHp6EN3aXIkFf3HvRH4wcb+/Q8RWul0d4JU679qcHYUnOwv+/2K3C5KaFj UG1JSypBN5MzuN5vVLmlFv1le1EvXAkz+ULJ0= MIME-Version: 1.0 Received: by 10.100.240.9 with SMTP id n9mr6229812anh.80.1241192537080; Fri, 01 May 2009 08:42:17 -0700 (PDT) In-Reply-To: References: Date: Fri, 1 May 2009 10:42:17 -0500 Message-ID: <3c14c5540905010842s4109479dt7affed1617337548@mail.gmail.com> Subject: Re: [FlyRotary] Re: Exhaust system wall thickness From: Bill Eslick To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0016368e264f4543da0468dba848 --0016368e264f4543da0468dba848 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Chris, You will definitely need some shielding on virtually all the exhaust that is internal to the cowl. I have used light aluminum on standoffs held with hose clamps, have used aluminum foil RTVd to the inside of the cowl, and have placed aluminum shields mounted between engine mounts, wiring bundles, etc. The radiant heat will melt most any non-metallic object within a foot or two of the pipe if it is not shielded. I have over 600 hours now, and the shields are doing a fine job. You will know if you missed shielding a plastic conduit, for instance, because it will look like heat shrink. (Don't ask.) That looks like a neat installation, keeping it under the cowl. I ran over 200 hours with a similar set-up on my 13B before my (homemade) muffler finally melted. After that I decided to put the muffler under the belly to get the heat outside the cowl. Yours should last much longer with the Renesis. Bill Eslick On Fri, May 1, 2009 at 8:06 AM, The Mallorys wrote: > Here is the picture of my exhaust. > > I still have the Mazda heat shields, but haven't used them yet.* I might > have to use some shielding on the "tail pipe" portion of my exhaust, as it > bends and moves down. > * --0016368e264f4543da0468dba848 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Chris,

You will definitely need some shielding on virtually all the = exhaust that is internal to the cowl.=A0 I have used light aluminum on stan= doffs held with hose clamps, have used aluminum foil RTVd to the inside of = the cowl, and have placed aluminum shields mounted between engine mounts, w= iring bundles, etc.=A0 The radiant heat will melt most any non-metallic obj= ect within a foot or two of the pipe if it is not shielded.

I have over 600 hours now, and the shields are doing a fine job.=A0 You= will know if you missed shielding a plastic conduit, for instance, because= it will look like heat shrink. (Don't ask.)

That looks like a n= eat installation, keeping it under the cowl.=A0 I ran over 200 hours with a= similar set-up on my 13B before my (homemade) muffler finally melted.=A0 A= fter that I decided to put the muffler under the belly to get the heat outs= ide the cowl.=A0 Yours should last much longer with the Renesis.

Bill Eslick

On Fri, May 1, 2009 at 8:= 06 AM, The Mallorys <candtmallory@cebridge.net> wrote:

Here is the picture of my exhaust.

<snip>

I still have the Mazda heat shields, but haven't used them yet. =A0I= might
have to use some shielding on the "tail pipe" portion of my exhau= st, as it
bends and moves down.

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