X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost01.isp.att.net ([207.115.11.51] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3883604 for flyrotary@lancaironline.net; Mon, 12 Oct 2009 16:51:54 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.51; envelope-from=keltro@att.net DKIM-Signature: v=1; q=dns/txt; d=att.net; s=dkim01; i=keltro@att.net; a=rsa-sha256; c=relaxed/relaxed; t=1255380715; h=Content-Type: MIME-Version:In-Reply-To:Message-Id:Date:Subject:To:From; bh=rjU3a6 gGSh0DSJMaxOLdDbnH3EXesQt7Nk+tV2cObLI=; b=SLRGLF8fnLY8G3f41/b8cN2Li ruGwlevUCTAWgas4VBgWfkvvnYTpJMFfNFsrMI2Jxq5mhTiWotKe9UT188FEQ== Received: from fwebmail02.isp.att.net ([204.127.218.102]) by isp.att.net (frfwmhc01) with SMTP id <20091012205119H0100h9sj5e>; Mon, 12 Oct 2009 20:51:19 +0000 X-Originating-IP: [204.127.218.102] Received: from [208.114.34.233] by fwebmail02.isp.att.net; Mon, 12 Oct 2009 20:51:18 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: Re: where's the missing power? Date: Mon, 12 Oct 2009 20:51:18 +0000 Message-Id: <101220092051.11267.4AD396C60001F9B500002C0322216125569B0A02D29B9B0EBF019D9B040A05@att.net> In-Reply-To: X-Mailer: AT&T Message Center Version 1 (Mar 2 2009) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_11267_1255380678_0" --NextPart_Webmail_9m3u9jl4l_11267_1255380678_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Lynn, Another thought.............What do you think an "Extractor" system (In my "Delta's" case one on each side of the bottom "V") consisting of large diameter tubes (5-6" ?) exiting behind the cockpit with 2" tubes down the middle and open to forward motion and prop blast would do to noise level ??............. -- Kelly Troyer "Dyke Delta"_13B ROTARY Engine "RWS"_RD1C/EC2/EM2 "Mistral"_Backplate/Oil Manifold -------------- Original message from Lynn Hanover : -------------- Lynn, I would like to see a drawing and I am sure others of the group would also !!.............I know this is splitting hairs but I am planning on splitting my exhaust after the collector to two mufflers (no good reason other than the Dyke Delta bottom skin has a "Keel" shape (V) and I want to keep the bottom symmetrical with a muffler (recessed with cooling air) on each side of the "V" ) and I wonder what size you would use from the 2.75" to branch off to the mufflers ??......... Again Thanks, Kelly Troyer "Dyke Delta"_13B ROTARY Engine "RWS"_RD1C/EC2/EM2 "Mistral"_Backplate/Oil Manifold The single pipe would about 5.9 square inches. A 2" tube would be 3.14 square inches. So I would use 2 inch tubing. Most modern V-8s have a combiner "X" fitting in the center of the two pipe system. It produces lower back pressure and a less harsh tone. I will make some drawings. Lynn E Hanover --NextPart_Webmail_9m3u9jl4l_11267_1255380678_0 Content-Type: multipart/related; boundary="NextPart_Webmail_9m3u9jl4l_11267_1255380678_1" --NextPart_Webmail_9m3u9jl4l_11267_1255380678_1 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Lynn,

Another thought.............What do you think an "Extractor" sy= stem (In my "Delta's" case

one on each side of the bottom "V") consisting of large diameter&= nbsp;tubes (5-6" ?) exiting

behind the cockpit with 2" tubes down the middle and open to forw= ard motion and prop

blast would do to noise level ??.............

--
Kelly Troyer
"Dyke Delta"_1= 3B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifol= d

-------------- Original message from Lynn Hanover <lehano= ver@gmail.com>: --------------

Lynn,

I would like to see a drawing and I am = sure others of the group would also !!.............I

know this is splitting hairs but I am planning on sp= litting my exhaust after the collector to two

mufflers (no good reason other than the Dyke Delta b= ottom skin has a "Keel" shape (V)

and I want to keep the bottom symmetrical with a muf= fler (recessed with cooling air) on each

side of the "V" ) and I wonder what size you would u= se from the 2.75" to branch off to the mufflers ??.........

Again Thanks,

Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
= "RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold

The single pipe would about 5.9 square inches. A 2" = tube would be 3.14 square inches. So I would use 2 inch tubing. Most modern= V-8s have a combiner "X" fitting in the center of the two pipe system. It = produces lower back pressure and a less harsh tone.

I will make some drawings.

Lynn E Hanover

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