X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 13 Aug 2014 16:18:44 -0400 Message-ID: X-Original-Return-Path: Received: from rc3-smtp.comporium.net ([208.104.2.7] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTP id 7093519 for lml@lancaironline.net; Wed, 13 Aug 2014 15:52:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=208.104.2.7; envelope-from=snopercod@comporium.net Received: from rg25.comporium.net ([208.104.244.60]) by rc3-smtp.comporium.net ({885c17cc-cff6-4d92-8caa-cc0fa3baf93b}) via TCP (outbound) with ESMTP id 20140813195146327 for ; Wed, 13 Aug 2014 19:51:46 +0000 X-RC-FROM: X-RC-RCPT: Received: from 208-104-132-203.brvd.dsl.dyn.comporium.net (EHLO _127.0.0.1_) ([208.104.132.203]) by rg24.comporium.net (MOS 4.3.4-GA FastPath queued) with ESMTP id SHM36234 (AUTH snopercod); Wed, 13 Aug 2014 15:51:46 -0400 (EDT) X-Original-Message-ID: <53EBC1C9.8090300@comporium.net> X-Original-Date: Wed, 13 Aug 2014 15:51:37 -0400 From: John Cooper User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Re: [LML] Best size inlet LNC2 Content-Type: multipart/alternative; boundary="------------050509050102080705090104" X-MAG-OUTBOUND: comporium.redcondor.net@208.104.244.48/28 This is a multi-part message in MIME format. --------------050509050102080705090104 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit On my L-235 with the O-290-D2 engine, I used an analysis similar to what Chris Z. just posted. I figured out the velocity of the air going through the carburetor and compared that to the velocity of the airplane and came up with an expanding ram air inlet that would slow the air down from 170 KTS to whatever the carb needed (can't remember). I'll have to measure my intake opening, but I believe it is ~ 2-3/4" in diameter and expands to 4" in diameter over 11" for a 7° taper on each wall (total included angle of 14 °). The ram air inlet is connected to the K&N filter and airbox with a short piece of 4" scat duct. I hope it works (grin). Note that I made the "cod piece" removable for easy access to check the lower part of the engine and change the oil. --------------050509050102080705090104 Content-Type: multipart/related; boundary="------------010205070300000009030004" --------------010205070300000009030004 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On my L-235 with the O-290-D2 engine, I used an analysis similar to what Chris Z. just posted. I figured out the velocity of the air going through the carburetor and compared that to the velocity of the airplane and came up with an expanding ram air inlet that would slow the air down from 170 KTS to whatever the carb needed (can't remember). I'll have to measure my intake opening, but I believe it is ~ 2-3/4" in diameter and expands to 4" in diameter over 11" for a 7° taper on each wall (total included angle of 14 °). The ram air inlet is connected to the K&N filter and airbox with a short piece of 4" scat duct. I hope it works (grin).

Note that I made the "cod piece" removable for easy access to check the lower part of the engine and change the oil.


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