X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost06.isp.att.net ([207.115.11.56] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2782582 for flyrotary@lancaironline.net; Sat, 08 Mar 2008 00:35:59 -0500 Received-SPF: none receiver=logan.com; client-ip=207.115.11.56; envelope-from=keltro@att.net Received: from fwebmail34.isp.att.net ([204.127.221.134]) by isp.att.net (frfwmhc06) with SMTP id <20080308053520H0600cq7q5e>; Sat, 8 Mar 2008 05:35:20 +0000 X-Originating-IP: [204.127.221.134] Received: from [4.244.72.186] by fwebmail34.isp.att.net; Sat, 08 Mar 2008 05:35:20 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: Merge Collector Question Date: Sat, 08 Mar 2008 05:35:20 +0000 Message-Id: <030820080535.10029.47D2259800029E2C0000272D22243429029B0A02D29B9B0EBF019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 25 2008) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_10029_1204954520_0" --NextPart_Webmail_9m3u9jl4l_10029_1204954520_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Doug, From previous chatter on the list the answer seems to be to go up to about 2.5 inch for the collector to take advantage of the scavaging pulse where the two equal length primary tubes converge..........This 1/2 wave pulse was said to be at about 12 inches for the primary tubes at about 6000 rpm for the rotary.........If I recall correctly.......... -- Kelly Troyer "Dyke Delta"_13B ROTARY Engine "RWS"_RD1C/EC2/EM2 "Mistral"_Backplate/Oil Manifold -------------- Original message from DLOMHEIM@aol.com: -------------- I need to order in a Merge Collector for my exhaust system and I was wondering what some of you are doing in this dept. Can I get a way with two 2" into one 2" collector or does it need to be 2.5" or 3" on the way to the muffler? Also, is burns he only good source for this? Their price seems pretty steep for a two into on collector in 304/.065 SS. Thanks for any inputs. Doug Lomheim RV-9A, OK City, OK FWF It's Tax Time! Get tips, forms and advice on AOL Money & Finance. --NextPart_Webmail_9m3u9jl4l_10029_1204954520_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Doug,

From previous chatter on the list the answer seems to be

to go up to about 2.5 inch for the collector to take advantage

of the scavaging pulse where the two equal length primary

tubes converge..........This 1/2 wave pulse was said to be at

about 12 inches for the primary tubes at about 6000 rpm

for the rotary.........If I recall correctly..........

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

-------------- Original message from DLOMHEIM@aol.com: --------------

I need to order in a Merge Collector for my exhaust system and I was wondering what some of you are doing in this dept. Can I get a way with two 2" into one 2" collector or does it need to be 2.5" or 3" on the way to the muffler? Also, is burns he only good source for this? Their price seems pretty steep for a two into on collector in 304/.065 SS.

Thanks for any inputs.

Doug Lomheim

RV-9A, OK City, OK FWF

It's Tax Time! Get tips, forms and advice on AOL Money & Finance.

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